Dat Physics Quiz

The ball rolls up to point B from point A, and then back down to point A. What graph shows the SPEED of the ball?

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The ball rolls up to point B from point A, and then back down to point A. What graph shows the HORIZONTAL VELOCITY of the ball?

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A runner on a circular track takes 10 seconds to run the 100 m, and ends where they started. What is the distance traveled and the displacement of the runner?

• Distance: 100 m

  Displacement: 0 m

• Distance: 0 m

  Displacement: 100 m

• Distance: 100 m

  Displacement: 100 m

• Distance: 0 m

  Displacement: 0 m

A factory’s smokestack continually produces smoke. The smoke always rises with a constant speed relative to the air around it. Suppose that the air was initially still, then abruptly started blowing to the right, then abruptly became still again for some time. Which of the following could show the resulting shape of the smoke plume?

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A car is driving on a semicircular racetrack. Its velocity at several points along the track is shown below. Which of the following could depict its acceleration at the corresponding points?

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Two massless rods are attached to frictionless pivots, with their ends touching. Without friction, what force F' must be applied so that the system remains in equilibrium?

• F

• F/8

• F/2

• 2F

The position vs. time graph for an object moving in a straight line is shown below. What is the instantaneous velocity at t = 2 s?

• More information is needed.

• 0 m/s

• 2 m/s

• -2 m/s

Shown below is the velocity vs. time graph for a toy car moving along a straight line. What is the maximum displacement from start for the toy car?

• 3 m

• 5 m

• 7 m

• 7.5 m

A cannon fires projectiles on a flat range at a fixed speed but with variable angle. The maximum range of the cannon is L. What is the range of the cannon when it fires at an angle π/6 above the horizontal? Ignore air resistance.

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A spring has a 0.2kg mass attached to one end, which oscillates with a period of 3s. What is the frequency?

• 3 Hz

• 0.13 Hz

• 0.4 Hz

• 0.3 Hz