AP (Advanced Placement) Physics(B-C): Questions 342 - 344 of 921

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Question 342

Question

MCQ▾

The graph represents the collision of an object of mass with a wall. Determine the magnitude of the change in velocity of the object during the impact.

Graph of Force as a Function of Time

Choices

Choice (5)Response

a.

b.

c.

d.

e.

All of the above

Question 343

Question

MCQ▾

A ball is placed on a ramp and allowed to roll to the bottom onto a table. The velocity of the ball is determined by how far the ball lands from the edge of the table on the floor below. The kinetic energy at the bottom of the ramp is significantly less than the gravitational potential energy change from the top to the bottom of the ramp. What is most likely the reason for this discrepancy?

Choices

Choice (5)Response

a.

The transfer of thermal energy to the ball from the ramp

b.

The work done by the gravitational force on the ball

c.

The work done by the normal force on the ball

d.

The work done by the friction force on the ball

e.

All of the above

Question 344

Question

MCQ▾

A nickel atom sliding on a smooth surface collides elastically and head-on with a second nickel atom that is stationary. What is the motion of the nickels after the collision?

Choices

Choice (5)Response

a.

The first nickel atom stops where the second nickel atom had been sitting, and the second nickel atom starts moving in a straight line with the first nickel՚s velocity.

b.

Both nickel atoms move ahead along trajectories that are perpendicular to each other.

c.

The first nickel atom bounces back and moves backward in a straight line with velocity equal to the negative of its initial velocity.

d.

Both nickel atoms move forward along a line, with the first nickel atom moving more slowly than the second nickel atom.

e.

None of the above

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