AP (Advanced Placement) Physics(B-C): Questions 38 - 41 of 920

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Question number: 38

» Torque and Equilibrium

MCQ▾

Question

A meter stick with a mass of balances horizontally when a pivot is placed at the middle (on the mark). When an unknown object is placed at the mark, the pivot must be moved to the mark for the system to balance (Shown in figure). What is the mass of the unknown object?

An unknown object placed on meter scale

An Unknown Object Placed on Meter Scale

In figure an unknown object is placed on meter scale is shown.

Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

Question number: 39

» Gravitation and Circular Motion

MCQ▾

Question

The moon’s mass is about one sixth that of Earth. Compared to the gravitational force that Earth exerts on the moon, the gravitational force that the moon exerts on Earth is

Choices

Choice (5) Response

a.

twice as much

b.

the same

c.

one sixth as much

d.

one half as much

e.

None of the above

Question number: 40

» Torque and Equilibrium

MCQ▾

Question

A long screwdriver is used to try open the lid of paint can. The person applies a downward force of at the handle end of the screwdriver and supports the screwdriver on the edge of the can from the screwdriver’s tip. What is the force required to lift open the paint can without the screwdriver?

Choices

Choice (5) Response

a.

b.

c.

d.

e.

All of the above

Question number: 41

» Gravitation and Circular Motion

MCQ▾

Question

An object at the end of a string is whirled in a horizontal circle at constant speed, as in the diagram. If the mass of the object is grams and the angle is equal to , which of the following expressions allows you to solve for the tension in the string in Newton?

 An object whirled in horizontal circle

an Object Whirled in Horizontal Circle

Figure shows, an object whirled in horizontal circle.

Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

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