Physics A - Unit 7 Review

If the ball in the figure lands in 1.0s, about what height was it thrown from? (x = 25m)

• 1 m

• 5 m

• 20 m

• 25 m

In the figure, a washer on a string (string not shown) moves in the circular path shown in red. Which arrow best describes the direction of the force acting on the washer at that instant in time?

• arrow A

• arrow B

• arrow C

• arrow D

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NGSS.HS-PS2-1

A position-time graph of a spring is shown here. What is the approximate amplitude of the spring's motion?

• 0.1 m

• 0.2 m

• 0.3 m

• 0.4 m

The moon's gravity is one-sixth that of the earth. What is the period of a 0.50 m long pendulum on the moon?

• 7.0 s

• 1.4 s

• 1.9 s

• 3.5 s

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NGSS.HS-PS2-4

An archer shoots an arrow horizontally and his friend drops a marble from the same height when the arrow is released. In the absence of air resistance, which of the following happens?

• The arrow hits the ground first.

• The marble hits the ground first.

• Both hit the ground at the same time.

• You cannot tell from the information given.

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NGSS.HS-PS2-4

While racing on a flat track, a car rounds a curve of 56 m radius and instantaneously experiences a centripetal acceleration of 18 m/s2 . How fast was the car going?

• 32 m/s

• 100 m/s

• 840 m/s

• 1000 m/s

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NGSS.HS-PS2-1

A 0.80 m wide door turns though an angle of 45°. How long is the arc of the displacement?

• 0.45 m

• 0.63 m

• 0.80 m

• 1.0 m

For a spring oscillating in simple harmonic motion, at what point will the velocity of the spring be greatest?

• maximum possible amplitude

• equilibrium point

• maximum negative amplitude

• half of maximum positive amplitude

A placekicker kicks a football at an angle of 60°. At what angle will the football hit the ground?

• 30 degrees

• 45 degrees

• 60 degrees

• 90 degrees

How would you increase the period of the spring whose motion is shown in the graph?

• increase the mass

• increase the initial displacement

• decrease the mass

• decrease the initial displacement