# Work, Energy and Power (AP (Advanced Placement) Physics(B-C)): Questions 5 - 7 of 76

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## Question number: 5

» Work, Energy and Power

MCQ▾

### Question

On a curved level roadway with a radius of , the suggested speed limit is approximately to safely negotiate the curve at the posted speed, what must the coefficient of friction be between a car’s tires and the road?

### Choices

Choice (5) Response

a.

0.4

b.

0.2

c.

0.1

d.

0.3

e.

Question does not provide sufficient data or is vague

## Question number: 6

» Work, Energy and Power

MCQ▾

### Question

A small metal cube with a temperature of is placed in contact with a much larger cube of the same metal with a temperature of . Assuming no loss of energy to the environment around the cubes, which of the following statements is true regarding the transfer of energy that takes place?

### Choices

Choice (5) Response

a.

The smaller cube will actually transfer more energy to the larger cube than the larger cube transfers to the smaller one.

b.

The smaller cube will undergo a greater change in temperature than the larger cube.

c.

After a long time, the final temperature of both cubes will be .

d.

The smaller cube will contain more internal energy than the larger cube after the two cubes reach an equilibrium temperature.

e.

Question does not provide sufficient data or is vague

## Question number: 7

» Work, Energy and Power

MCQ▾

### Question

A box of mass m is being pushed a distance across a level surface at constant speed. In which of the following cases would the most work be done by a force on the box?

### Choices

Choice (5) Response

a.

The force is at a angle to the floor.

b.

The force is at a angle to the floor.

c.

The force is horizontal and parallel to the floor.

d.

The force is at a angle to the floor.

e.

Question does not provide sufficient data or is vague