AP (Advanced Placement) Physics(B-C): Questions 280 - 282 of 921

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Question number: 280

» Fluids & Solids

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MCQ▾

Question

A ball floats half submerged in a liquid. Which of the following statements is true?

Choices

Choice (5)Response

a.

The ball’s weight is equal to the weight of the fluid displaced.

b.

The ball’s density is the same as the liquid’s density.

c.

The buoyant force on the ball is less than the weight of the ball.

d.

The buoyant force on the ball is greater than the weight of the ball.

e.

None of the above

Question number: 281

» Work, Energy and Power

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MCQ▾

Question

A horizontal spring of a spring constant is placed on a horizontal surface and is attached at one end to a wall. A block with a mass of is used to compress the spring a distance of . The block travels from the equilibrium position after loose constant with spring. If the mass of the spring is negligible and the coefficient of friction between the block and the surface is , determine the speed of the block at the moment it loses contact with the spring.

Choices

Choice (5)Response

a.

b.

c.

d.

e.

Question does not provide sufficient data or is vague

Question number: 282

» Magnetic Field & Electromagnetism

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MCQ▾

Question

In which of the following cases would a uniform magnetic field exert the largest magnitude of force on a charged particle?

Choices

Choice (5)Response

a.

The charge of is placed stationary in the magnetic field.

b.

The charge of is moving at velocity directly along the magnetic field lines.

c.

The charge of is moving at an angle of to the direction of the magnetic field.

d.

The charge of is moving at velocity perpendicular to the magnetic field line.

e.

None of the above

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