AP (Advanced Placement) Physics(B-C): Questions 170 - 172 of 921

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Question number: 170

» Force and Newton's Law of Motion

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MCQ▾

Question

A test car finishes a race, but its brakes have failed completely so driver engages a parachute from the rear of the car to slow down. Initially, it is traveling at , and in it has slowed down to . What is the magnitude of the average force exerted on the car by the parachute?

Choices

Choice (5)Response

a.

b.

c.

d.

e.

Question does not provide sufficient data or is vague

Passage

Top view of wheel and axle system

Top View of Wheel and Axle System

Question number: 171 (1 of 2 Based on Passage) Show Passage

» Torque and Equilibrium

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MCQ▾

Question

The figure shows a top view of a wheel and axle system, with four forces applied to it so that the forces produce torques. Each forces are assumed to be applied on a tangent to either the wheel or the axle. The wheel has a radius of , and the axle has a radius of . If the rotational inertia of wheel and axle system is , then what is the angular acceleration of the system?

Choices

Choice (5)Response

a.

clockwise

b.

counterclockwise

c.

counterclockwise

d.

clockwise

e.

All of the above

Question number: 172 (2 of 2 Based on Passage) Show Passage

» Torque and Equilibrium

Edit
MCQ▾

Question

The figure shows a top view of a wheel and axle system, with forces and applied at a tangent in each cases. The radius of the wheel is , and the radius of the axle is . What is the net torque on the wheel?

Choices

Choice (5)Response

a.

Clockwise

b.

Counterclockwise

c.

Clockwise

d.

Counterclockwise

e.

All of the above

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