Physics Quiz: Motion and Acceleration

According to Galileo's discovery, why can parachutists form a ring in midair?

• Because they fall with different accelerations

• Because they fall with the same acceleration

• Because they fall with increasing speed

• Because they fall with decreasing speed

In the multiflash photo of a dropped ball, what happens to the distance between each pair of images as the ball falls?

• The distance remains the same

• The distance decreases

• The distance increases

• The distance fluctuates

If a ball is thrown upward with a speed of 20.0 m/s, what happens to its velocity?

• The velocity remains constant

• The velocity increases

• The velocity decreases

• The velocity fluctuates

After 1 second, what is the velocity of the ball thrown upward?

• +9.8 m/s

• +10.2 m/s

• -9.8 m/s

• -10.2 m/s

After 2 seconds, what is the velocity of the ball thrown upward?

• +0.4 m/s

• +1.0 m/s

• -0.4 m/s

• -1.0 m/s

After 4 seconds, what is the velocity of the ball thrown upward?

• -19.2 m/s

• -20.0 m/s

• +19.2 m/s

• +20.0 m/s

During which second does the rising ball stop and reverse direction?

• 1st second

• 2nd second

• 3rd second

• 4th second