Question 1

Why will a steel ball bounce when dropped on a trampoline but not when dropped on a wooden floor?

Accepted Answer

The answer of Why will a steel ball bounce when...

Question 2

Why does one tend to shorten one's stride when walking on the ice?

Accepted Answer

The answer of Why does one tend to shorten one's...

Question 3

What happens to the total energy of the system during the interaction of a golf club and golf ball?

Accepted Answer

According to the law of conservation of energy, the total energy of a closed system remains constant. In the interaction between a golf club and a golf ball, energy may be transferred between the two objects, but the total energy of the system remains constant. Therefore, the correct answer is A, remains constant.

Question 4

Why do one's feet drop if the head is lifted in a face floating position in swimming?

Accepted Answer

The answer of Why do one's feet drop if the...

Question 5

Mechanical work involves a _____ and the _____ that it moves through.

Accepted Answer

Mechanical work is defined as the product of force applied to an object and the distance through which that force is applied. Therefore, mechanical work involves force and the distance that it moves through, making choice A the correct answer.

Question 6

Why is it more difficult to stop a sled carrying 2 people on than to stop a sled carrying 1 person if both have the same velocity?

Accepted Answer

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Question 7

How much work is done if you hold a tennis racquet in your hand without moving it?

Accepted Answer

Work is defined as force multiplied by displacement in the direction of the force. If the racquet is not moved, there is no displacement and therefore no work is done.

Question 8

What type of energy is possessed by a projectile with a horizontal velocity at the peak of the path?

Accepted Answer

At the peak of its path, a projectile possesses both kinetic energy due to its horizontal velocity and potential energy due to its height above the ground.

Question 9

Why is it more difficult to run on the beach than on the street?

Accepted Answer

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Question 10

The _____ the time it takes to move a given distance, the greater is the power.

Accepted Answer

Power is defined as the amount of work done per unit time. Therefore, the shorter the time it takes to move a given distance, the greater is the power.

Quiz 12: The Conditions of Linear Motion