different between force and work​

The energy of an object in motion is called kinetic energy

Kinetic energy is defined as the energy possessed by an object due to its motion. The amount of kinetic energy an object has is directly proportional to its mass and the square of its velocity. Mathematically, the formula for kinetic energy is:

Kinetic energy = 1/2 x mass x velocity^2

Where:

Mass (m) is the mass of the object in kilograms (kg)

Velocity (v) is the velocity of the object in meters per second (m/s)

Kinetic energy is a scalar quantity, which means it has only magnitude and no direction. It is measured in joules (J) in the SI unit system.

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If the pulling is done parallel to the ground, we have by Newton's second law

8 N + (-f ) = (2 kg) (2.5 m/s²)

where f is the magnitude of the friction force. Solve for f :

8 N - f = 5 N

f = 3 N

Answer:

C

Explanation: Water vapor can turn into liquid water when it cools and Liquid water turns into vapor when it heats

Answer:19.1m

Explanation:

Answer:

Pick something up with your hand and drop it. When you release it from your hand, its speed is zero. On the way down its speed increases. The longer it falls the faster it travels. Sounds like acceleration to me.

But acceleration is more than just increasing speed. Pick up this same object and toss it vertically into the air. On the way up its speed will decrease until it stops and reverses direction. Decreasing speed is also considered acceleration.

But acceleration is more than just changing speed. Pick up your battered object and launch it one last time. This time throw it horizontally and notice how its horizontal velocity gradually becomes more and more vertical. Since acceleration is the rate of change of velocity with time and velocity is a vector quantity, this change in direction is also considered acceleration.

In each of these examples the acceleration was the result of gravity. Your object was accelerating because gravity was pulling it down. Even the object tossed straight up is falling — and it begins falling the minute it leaves your hand. If it wasn't, it would have continued moving away from you in a straight line. This is the acceleration due to gravity.

In this initial experiment the bowling ball drops straight to the ground whereas the feathers float, owing to air resistance.

He alludes to the earlier experiment by Galileo that tested the same hypothesis.

"Galileo’s experiment was simple," he explains. "He took a heavy object, and a light one, and dropped them at the same time to see which fell fastest."

Although Galileo’s experiment proved two similarly shaped objects would fall at the same speed despite being different weights, he didn’t have access to a vacuum chamber in the 17th Century to conduct Professor Cox's more extravagant experiment.

Professor Cox also used the bowling ball and feather to prove a hypothesis put forward by Albert Einstein.

His Special Theory of Relativity argued that items would not be falling but standing still due to lack of force acting on them.

"Isaac Newton would say that the ball and the feather fall because there’s a force pulling them down: gravity,’ Professor Cox said.

"But Einstein imagined the scene very differently.

"The “happiest thought of his life” [as Einstein called it] was this; the reason the bowling ball and the feather fall together is because they’re not falling.

"They’re standing still. There is no force acting on them at all.

"He reasoned that if you couldn’t see the background, there’d be no way of knowing that the ball and the feathers were being accelerated towards the Earth.

"So he concluded they weren’t."

The tweaking of Newton’s earlier theory enabled Einstein to more accurately define his own theory, which regards the relationship between space and time.

hope it helps you

Explanation:

v= (f) x ( lambda)

1.7 ms^-1/12.05 m = f =o.14 hz

Answer:

Isaac Newton discovered that as an object's mass increases, the gravitational attraction of that object increases. Thus, the gravitational attraction on the Moon is much less than it is here on Earth, and a person weighs less on the Moon.

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Answer:

When you have two materials with the same index of refraction, it means that if they are touched by a ray of light it won't have a chance, and its form would prevail.

Explanation:

The reason behind this is that in the first place. When light passes through an object of certain refraction it is modified from its natural state, allowing it to change in color to the human eye or many other effects in other perceptive elements. However, when the same light passes through two objects with the same refraction due to their physical characteristics, it doesn't change because once it comes out of the first one it will suffer the same effect from the last one. For it to change the refraction would have to be higher or lower. Then it would be modified. The reason is because the dimensions are not modified. Because at some point the ray of light has to come out of the first one to enter the second one.

We will have the following:

So, the momentum of the car is 3258.75 kg*m/s.

To cancel the polarization of a NaLi molecule, an electric field of magnitude 5.33 V/Å needs to be applied along the molecular axis in the direction opposite to the polarization.

To double the polarization of a NaLi molecule, an electric field of magnitude 10.66 V/Å needs to be applied along the molecular axis in the direction of the polarization.

The polarization of a NaLi molecule is due to the difference in electronegativity between sodium and lithium. Sodium is more electropositive than lithium, which means that it has a stronger affinity for electrons.

This means that the electrons in the NaLi molecule are more likely to be found closer to the sodium atom than the lithium atom.

The electric field will exert a force on the electrons in the NaLi molecule, trying to pull them away from the sodium atom and towards the lithium atom. If the electric field is strong enough, it will be able to cancel the polarization of the molecule.

The magnitude of the electric field needed to cancel the polarization of a NaLi molecule can be calculated using the following formula:

E = 2qd / e

where:

E is the magnitude of the electric field

q is the charge of an electron

d is the inter-atomic distance

e is the permittivity of free space

In this case, the magnitude of the electric field needed to cancel the polarization of a NaLi molecule is:

E = 2 * (1.602 * 10^-19 C) * (3.0 * 10^-10 m) / (8.854 * 10^-12 C^2 / N m^2) = 5.33 V/Å

To double the polarization of a NaLi molecule, the electric field would need to be twice as strong. This means that the magnitude of the electric field would need to be 10.66 V/Å.

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The amount of wavelength of light thick is the thumbnail x/y.

Given:

Wavelength of light= x

Thickness of thumbnail= y

The amount of wavelength thick the thumbnail is x/y

What is wavelength?

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It reduces the moment of inertia denoted by (I). This moment of inertia is directly proportional to (MR)² Where M = mass & R = distance from the rotational axis. Since the net external torque is absent, angular momentum (L) remains unchanged as L= I.W, and Kinetic energy or angular speed increases.

The amount that is expressed by a body's ability to resist angular acceleration is calculated as the product of each particle's mass and the square of its distance from the rotational axis.

The rotational counterpart of linear force is torque. The moment of force is another name for it. It illustrates how a force can cause a change in the body's rotational motion.

Hence, the net external torque is absent, angular momentum (L) remains unchanged as L= I.W, and Kinetic energy or angular speed increases.

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Answer:

V= 125volts

Explanation:

R =25ohms

I = 5 amp

V = ?

t = 36seconds

V = IR

V = 5× 25

V= 125volts

Q = It

Q = 5×36

Q = 180 coulombs

Q is the amount of charge.

Answer: A

Explanation: Areas of tundra lies in the northern hemisphere, having part of North America, Greenland and Eurasia. It has latitude and longitude 71.2° North and 156° West. The temperature in tundra region is very low  and precipitation is also very less. The growing season is very short and vegetation is dominated by small sized shrubs only.

Answer:

Explanation:

Answer D. Interaction between a pen and paper while you write

Answer:

D.  interaction between a pen and paper while you write

Explanation:

plato

Since the horizontal component of the velocity is zero, the factor that is responsible for the two balls to reach the ground at the same time will be  the vertical velocities of the balls. The correct option is C

When an object is thrown from a tower, and at the same time another object is dropped vertically, both objects will reach the ground at the same time. This occurs because of gravity.

Given that Rob and his sister Joan are standing on their apartment balcony. Rob throws a ball straight out from the balcony. At the same time, Joan drops a ball straight down. Both balls reach the ground at the same time.

They will both reach the ground at the same time because the component of motion under gravity is independent of the component perpendicular to it. Then, the horizontal component of the velocity will be zero.

Since the horizontal component of the velocity is zero, the factor that is responsible for the two balls to reach the ground at the same time will be  the vertical velocities of the balls

Therefore, the correct option is C. That is, the vertical velocities of the balls

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By 272.7 degrees angle has planet Y rotated through during this time.

The cubes of the semi-major axes of the planets' orbits are precisely proportional to the squares of the planets' orbital periods. According to Kepler's Third Law, as an orbiting planet's radius rises, so does the time of its orbit around the Sun.

Using Kepler's 3rd law, which says that the period of any planet's orbit squared is proportional to the radius of the orbit cubes, we can establish that

(period X / period Y)^2 = (radius X / radius Y)^3

(period X / period Y)^2 = 2^3 = 8

take sq root

period X / period Y = √8 = 2.82≅ 3

this means it takes planet X 2.82≅ 3  times longer to go through one orbit... so planet Y travels 2.82≅ 3  times as far (in its orbit...) as planet X!

This means...

planet Y travels   3 * 90.9  =   272.7 degrees

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Answer:

15.3 N

Explanation:

Force = mass x acceleration

= 2.55 kg x 6.00 m/s^2

= 15.3 kgm/s^2 = 15.3 N

The required force to accelerate a 2.55 kg remote-controlled toy car at a rate of 6.00 m/s^2 be 15.3 N.

The definition of force in physics is: The push or pull on a mass-containing item changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.

Given parameters:

Mass of the remote-controlled toy car : m = 2.55 kg.

Acceleration of  the remote-controlled toy car :a =  6.00 m/s^2

Now according to Newton's 2nd law of motion,

Force = mass x acceleration

= 2.55 kg x 6.00 m/s^2

= 15.3 kgm/s^2

= 15.3 N

Hence, required force is 15.3 N.

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A cantilever beam with an end mass is a mechanical structure that is widely used in engineering. This beam can vibrate naturally with a frequency that is determined by its mass and stiffness.

The natural frequency of a cantilever beam with an end mass can be calculated using the following formula:

f_n = [1 / 2π] * √(k_eff / m_eff), Where:f_n is the natural frequency of the cantilever beamk_eff is the effective stiffness of the beamm_eff is the effective mass of the beamIn this formula, k_eff is the sum of the beam's actual stiffness and the stiffness due to the mass at the end of the beam. Similarly, m_eff is the sum of the beam's actual mass and the mass of the object at the end of the beam.

This formula assumes that the beam is made of a homogeneous material and that the mass at the end of the beam is distributed uniformly. Additionally, it assumes that the beam is not subject to any external forces or vibrations. If these assumptions are not true, then the formula may not be accurate and other methods may need to be used to determine the natural frequency of the cantilever beam.

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Answer:

(-3, -3√3)

Explanation:

To convert from polar coordinate to rectangular coordinate, first you have to know these two equations:

\(\displaystyle{x=r\cos \theta}\\\displaystyle{y=r\sin \theta}\)

We know that (x,y) is in rectangular coordinate form while (r,θ) is in polar coordinate form.

Therefore, substitute r = 6 and θ = 240° in both equations:

\(\displaystyle{x=6\cos 240^{\circ}}\\\displaystyle{y=6\sin 240^{\circ}}\)

After evaluating, you'll get:

\(\displaystyle{x=-3}\\\displaystye{y=-3\sqrt{3}}\)

Therefore, substitute x and y in rectangular coordinate form - hence, the answer is (-3, -3√3)

Answer :B: Bulbs B and C will remain lit.

If the switch is closed and Bulb A is removed, Bulbs B and C will remain lit. Option B is correct.

An electric bulb is a gadget that uses electricity to create visible light. It is the most popular type of artificial lighting and is necessary for modern society.

The light bulb is connected to a switch in a parallel configuration. The switch is open, which means there will be a lot of resistance and no current will flow via this route.

Across the parallel connection, the battery would create the same potential difference. Because the current would not go via the open switch, it would instead flow through the light bulb, causing it to illuminate.

If the switch is closed, the circuit get completed, hence the current starts flowing in the circuit and the bulb start glowing.

When one bulb in a series circuit is removed out, the rest of the bulbs stop shining and shut off.

But if bulb A is removed,in that condition the only connected bulb can glow. If the switch is closed and Bulb A is removed, Bulbs B and C will remain lit.

Hence, option B is correct.

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The difference between two slits is 0.09m

It can be seen that the separation between two consecutive interference maxima is constant and independent of the order observed.

Considering that the small angle approximation is valid then we have to

                              y1 = (1* 5.10m* d/20) / d

                                y1 = 0.25

                               y2 = (1*5.10m*d/15) / d

                               y2 = 0.34

Therefore, the first order maximum produced by laser 1 is closer to the central maximum than that the 1st order maximum produced by laser 2.

Using a previous result y2 - y1

                                     0.34 - 0.25 = 0.09m

In the young's experiment the angular position of intensity maxima and minima of interference is determined by the separation between the slits, an integer number known as order of interference, and the wavelength of the light used.

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The kinetic energy of a pendulum is greatest at the bottom of its swing, when it is moving fastest.

As the pendulum swings away from its equilibrium position, it gains potential energy, which is converted into kinetic energy as it swings back toward the center. At the top of the swing, the pendulum briefly comes to a stop before changing direction and swinging back down, so its kinetic energy is momentarily zero. But as it reaches the bottom of the swing, it has the highest velocity and therefore the greatest amount of kinetic energy.

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The rms current in the circuit is 1.36 A when vrms is 30v , c = 1.8 µf, and f= 4.0khz.

To determine the rms current (Irms) in a circuit with a known rms voltage (Vrms), capacitance (C), and frequency (f), we can use the formula:

Irms = Vrms / (XC)

where XC is the capacitive reactance of the circuit, given by:

XC = 1 / (2πfC)

where π is the mathematical constant pi (approximately 3.14).

Substituting the given values into these equations, we

get:

XC = 1 / (2πfC) = 1 / (2 x 3.14 x 4000 x 1.8 x 10^-6) = 22.09 ohms

Irms = Vrms / (XC) = 30.0 V / 22.09 ohms = 1.36 A (rounded to two significant figures)

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Given

7 km north

5 km east

Procedure

The displacement is simply the difference in the position of the two marks and is independent of the path taken when traveling between the two marks.

Answer:

4 m/s

Explanation:

v=u+ at  and  v^2=u^2+2as.

It is given that  v=0,t=5  s    and  s=10  m.

⇒0=u+5a  and  0=u^2+20a.

⇒a=−u/5  and  a=−u^2/20.

⇒u/5 = u^2/20⇒u=4  m/s.

⇒  The initial velocity is  4  m/s.

According to the claim made, the electron moved across a potential difference of 2.84 * 10⁻² V.

Each spot in space has an electric field associated with it when there is charge current in any form. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the direction and intensity of the electromagnetic field.

Given;

Velocity, v = 10 * 10⁴ m/s = 10⁵ m/s

Potential difference, V = ?

Mass of electron = 9.11 * 10⁻³¹ kg

Charge of electron, q = 1.60 * 10⁻¹⁹C

The KE of an electron is the amount of energy in an electric field.

Thus, qV = 1/2mv²

Therefore, V = mv²/2q

Putting Values,

V = 9.11 * 10⁻³¹ * 10⁵ * 10⁵/2 * 1.6 * 10⁻¹⁹

= 9.11 * 10⁻²¹/3.2 * 10⁻¹⁹

V = 2.84 * 10⁻²

Thus, Potential difference is 2.84 * 10⁻² V

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Answer:

the unit of force in the centimeter-gram-second system equal to the force that would give a free mass of one gram an acceleration of one centimeter per second per second.Explanation:hope its a good answer

The damages of $100,000 awarded to the plaintiff are likely to be excluded from taxable income since they were awarded as compensation for physical injury.

In general, damages received in a lawsuit are taxable as income unless they are awarded for physical injury or sickness. In this case, since the plaintiff lost the use of her leg due to the assault, the damages awarded to her are likely to be considered compensation for physical injury.

However, it is important to note that there are certain exceptions and limitations to the exclusion of damages for physical injury. For example, punitive damages, which are awarded to punish the defendant for their behavior rather than to compensate the plaintiff for their injury, are generally not excludable from taxable income. Additionally, if the damages received include amounts for lost wages or other taxable income, those amounts will be subject to income tax.

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