AP (Advanced Placement) Physics(B-C): Questions 893 - 896 of 921

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Question number: 893

» Gravitation and Circular Motion

MCQ▾

Question

A roller coaster car loaded with passengers, has a mass of ; the radius of curvature of the track at the bottom point of a dip is . The vehicle has a speed of at this point. What is the force exerted on the vehicle by the track?

Choices

Choice (5) Response

a.

b.

c.

d.

e.

All of the above

Question number: 894

» Electrostatics

MCQ▾

Question

What is the electric field at distance of from the centre of a small sphere that has a net charge of ?

Choices

Choice (5) Response

a.

b.

c.

d.

e.

All of the above

Question number: 895

» Thermodynamics

MCQ▾

Question

“As temperature approaches absolute zero, the entropy of system approaches a constant minimum. ” This statement is:

Choices

Choice (5) Response

a.

Second law of Thermodynamics

b.

Third law of Thermodynamics

c.

Zeroth law of Thermodynamics

d.

First law of Thermodynamics

e.

Question does not provide sufficient data or is vague

Question number: 896

» Torque and Equilibrium

MCQ▾

Question

An acrobat performs the “trick” of walking on a loose board laid on top of a flat roof so that one fifth of the board’s length extends beyond the edge of the roof. If the length of the board is , the mass of the board is , and the mass of the acrobat is , how far beyond the edge of the roof can he stand safely on the board?

Choices

Choice (5) Response

a.

b.

c.

d.

e.

Question does not provide sufficient data or is vague

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