AP (Advanced Placement) Physics(B-C): Questions 72 - 74 of 921

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Question number: 72

» Torque and Equilibrium

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MCQ▾

Question

An oscillating pendulum is considered to be in translational equilibrium at the lowest point in its motion. Which of the following statements must be true?

Choices

Choice (5)Response

a.

The tension in the pendulum string must be equal to the weight of the pendulum bob.

b.

The tension in the pendulum string must be equal to the weight of the pendulum bob plus the centripetal force due to the pendulum’s motion.

c.

The tension in the pendulum string must be equal to times the sine of the angle from which the pendulum bob was released to start the motion.

d.

The horizontal force accelerating the pendulum at the bottom of its swing must be equal to the air drag force on the pendulum bob.

e.

All of the above

Question number: 73

» Gravitation and Circular Motion

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Question

If a ball of mass is tied to the end of a string of length and spun in a vertical circle with speed , then what will be the tension in spring at top of the circular path?

Choices

Choice (5)Response

a.

b.

c.

d.

e.

All of the above

Question number: 74

» Electrostatics

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MCQ▾

Question

The illustration shows two parallel charged metal plates. Which of the following statements is NOT true regarding the situation shown?

Two parallel charged plates

Two Parallel Charged Plates

Choices

Choice (5)Response

a.

The arrows represent the direction of the electric field between the plates.

b.

The horizontal dashed lines represent equipotential surfaces.

c.

The electric field increases in magnitude moving positive charged plate upward in the diagram.

d.

The top plate is at higher electric potential than the bottom plate.

e.

Question does not provide sufficient data or is vague

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