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lorasvet [3.4K]
2 years ago
10

A ball of mass m is dropped from rest from a height h and collides elastically with the floor, rebounding to its original height

.
What is the magnitude of the average force applied by the floor on the ball during the time the ball is in contact with the floor?

(A) Zero
(B) mg
(C) 2mg
(D) 4mg
(E) It cannot be determined without knowing the length of time that the ball is in contact with the floor.
Physics
2 answers:
grin007 [14]2 years ago
5 0

Answer:

option (E)

Explanation:

mass = m

height = h

initial velocity u = 0

The average force applied by the floor on the ball is the rate of change of momentum of the ball.

So, we need the time of contact of ball and floor, so it is not given in the question.

Thus, option (E)

Jet001 [13]2 years ago
3 0

Answer:

Explanation:

Given

mass m collides elastically with floor and jump to its original height I .e.velocity of rebound is same as the initial velocity

Impulse imparted by steel ball to the ground is given by the change in momentum of steel ball

J=\Delta P

and impulse is product of average force and time

so we need time to calculate the average force. So, option e is correct

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Sliva [168]

The stopwatch will be the most useful in determining the kinetic energy of a 50 g battery- powered car traveling a distance of 10 m.

<h3>What is kinetic energy?</h3>

Kinetic energy is the energy of a body possessed due to motion.

This means that for an object to possess kinetic energy, it must be in motion.

The kinetic energy is measured in Joules, which is a product of the mass of the substance and the time taken to travel a distance.

A stopwatch is an instrument used to measure time as one of the components of kinetic energy.

Therefore, the stopwatch will be the most useful in determining the kinetic energy of a 50 g battery- powered car traveling a distance of 10 m.

Learn more about kinetic energy at: brainly.com/question/12669551

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2 years ago
What is the kinetic energy of a ball that has a mass of 3kg and Is<br> moving at 5m/s?
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2 years ago
A gas sample is confined within a chamber that has a movable piston. A small load is placed on the piston; and the system is all
timurjin [86]

Explanation:

It is given that,

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Let P is the pressure exerted on the piston by the gas. The force per unit area is called the pressure exerted pressure of the gas. Mathematically, it is given by :

P=\dfrac{F}{A}

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We know that the atmospheric pressure is given by :

P_o=1.013\times 10^5\ Pa

So, the pressure is given by :

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Answer:

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Based on the aforementioned, let's analyze the statements in order of importance

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