AP Physics 1D Kinematics Review

An object is moving in a circle with constant speed. Which of the following is/are true?

I. The object has constant velocity

II. The object has nonzero acceleration

III. After one revolution, the magnitude of the displacement is a positive value.

• I only

• II only

• III only

• I and II only

• II and III only

An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height.Which of the following graphs would best represent acceleration versus time for the bouncing ball?

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Tags

NGSS.HS-PS2-1

The following three questions relate to two objects that start at x = 0 at t = 0 and move in one dimension independently of one another. Graphs, of the velocity of each object versus time are shown below.

Which object moves with constant non-zero acceleration?

• A

• B

• Both

• Neither

Tags

NGSS.HS-PS2-1

The graph above shows the velocity versus time for an object moving in a straight line. At what time after t = 0 does the object again pass through its initial position?

• Between 0 and 1

• 1 s

• Between 1 and 2 s

• 2s

• Between 2 and 3 s

Consider a ball thrown up from the surface of the earth into the air at an angle of 30° above the horizontal. Air friction is negligible. Just after the ball is released, its acceleration is:

• 0 m/s²

• Upwards at 9.8 m/s²

• Downwards at 9.8 m/s²

• Upwards at 4.9 m/s²

• None of these

Tags

NGSS.HS-PS2-1

At time t = 0, car X traveling with speed v₀ passes car Y which is just starting to move. Both cars then travel on two parallel lanes of the same straight road. The graphs of speed v versus time t for both cars are shown above. Which of the following is true at time t = 20 seconds?

• Car X is accelerating faster than car Y.

• Car Y is passing car X.

• Car Y is in front of car X.

• Car Y is behind car X

Tags

NGSS.HS-PS2-1

Above is a graph of the distance vs. time for car moving along a road. According the graph, at which of the following times would the automobile have been accelerating positively?

• 5, 29, & 57 min.

• 5, 12, 29, & 35 min.

• 12, 35, & 41 min.

• 0, 20, 38, & 60 min

Tags

NGSS.HS-PS2-1

The graph given here shows the position vs. time for an object traveling along the x-axis. Which graph below shows the velocity vs. time for this same object during the same time period?

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A ball is tossed straight up and later returns to the point from which it was launched. If the ball is subject to air resistance as well as gravity, which of the following statements is correct?

• The speed at which the ball returns to the point of launch is less than its speed when it was initially launched.

• The net work done by air resistance on the ball during its flight is zero.

• The time for the ball to fall is the same as the time for the ball to rise.

• The force of air resistance is directed down-ward both when the ball is rising and when it is falling.

• The net work done by gravity on the ball during its flight is greater than zero.

Tags

NGSS.HS-PS2-1

Ball A is thrown upward with 3 times the velocity of Ball B. How will its maximum height compare to Ball B’s maximum height?

• 2 times higher

• 3 times higher

• 6 times higher

• 9 times higher

• None of the above