# AP (Advanced Placement) Physics(B-C): Questions 340 - 343 of 921

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## Question number: 340

MCQ▾

### Question

A block of wood is placed in water and floats submerged (and thus above water). When the block is placed in an alcohol that is as dense as water, the block:

### Choices

Choice (5) Response

a.

Floats under the surface of the alcohol

b.

Sinks in the alcohol

c.

Floats under the surface of the alcohol

d.

Floats under the surface of the alcohol

e.

All of the above

## Question number: 341

MCQ▾

### Question

A baseball is thrown toward a target at a speed and exerts a force on the target when it collides with it. What is the force exerted on the target if the speed of the baseball is doubled on the second throw (assuming an elastic collision with the target)?

### Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

## Question number: 342

MCQ▾

### Question

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 In figure, the graph of force as a function of time is shown.

### Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

## Question number: 343

MCQ▾

### Question

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 work done by the normal force on the ball

b.

The transfer of thermal energy to the ball from the ramp

c.

The work done by the friction force on the ball

d.

The work done by the gravitational force on the ball

e.

All of the above