AP Physics C Mechanics Review

The position of an object is given as a function of time by x = 3t² + 5t³ - 2t
What is the acceleration of the object at time t = 2 s?

• 64 m/s/s

• 60 m/s/s

• 66 m/s/s

• 70 m/s/s

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A change in velocity over time is known as:

• acceleration

• constant speed

• average speed

• displacement

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What is happening at D?

• Stationary

• Accelerating

• Fast steady speed; moving away from the starting position

• Slower steady speed; moving away from the starting position

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NGSS.MS-PS3-1

What is the net force on this object?

• 80 N West

• 80 N East

• 40 N West

• 40 N East

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How does Newton's Second Law of Motion explain the acceleration of a car when the driver steps on the gas pedal?

• The car's mass decreases, causing acceleration.

• The force applied by the engine increases, causing acceleration.

• The car's velocity decreases, causing acceleration.

• The car's mass increases, causing acceleration.

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NGSS.HS-PS2-1

What is the formula for calculating force?

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DOK Level 1: Recall

What is the name for the turning force of a lever?

• moment

• torque

• force

• energy

If an object has a mass "m" and increases it's speed by 2 times, what happens to the amount of kinetic energy?

• Increases by two

• Increases by four

• Decreases by two 

• Decreases by four

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You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, about how much kinetic energy does it have?

• 10 J

• 100 J

• 7 J

• 20 J

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NGSS.MS-PS3-4

Two pucks are firmly attached by a stretched spring and are held at rest on a frictionless surface. They are released simultaneously. If puck I has 3X the mass of puck II, which of the quantities is the same for both as the spring pulls the two pucks?

• Speed 

• Magnitude of acceleration 

• Kinetic energy 

• Magnitude of momentum

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