PHYS 3.2 Formative

A soccer ball accelerates from rest and rolls 6.5 m down a hill in 3.1 s, then bumps into a tree. What is the speed of the ball just before it hits the tree?

• 4.2 m/s

• 8.2 m/s

• 6.4 m/s

• 2.1 m/s

Tags

NGSS.HS-PS2-1

A drag racer starts from rest and accelerates at 7.4 m/s². How much time (in sec) does it take to travel 5.0 m from its starting point?

Tags

NGSS.HS-PS2-1

A horse accelerates from rest for 1 s and covers a distance D. If instead, the horse accelerates from rest with the same acceleration for 2 s, what would the distance it covers be?

• 2D

• 4D

• 9D

• D

Tags

NGSS.HS-PS2-1

You apply the brakes and stop at a red light with constant acceleration. If your initial speed was 12 m/s, what is your average speed (in m/s) during braking?

A softball player is running toward home plate with a speed of 5.8 m/s when slides. She slides for 1.1 s, just reaching the plate as she stops. What is her acceleration in m/s² (assuming she's running in a positive direction)?

Tags

NGSS.HS-PS2-1

A softball player is running toward home plate with a speed of 5.8 m/s when slides. She slides for 1.1 s, just reaching the plate as she stops. What is her acceleration in m/s² (assuming she's running in a positive direction) and the distance (in m) it takes her to stop?

• -5.3 m/s² and 3.2 m

• -6.1 m/s² and 4.4 m

• -1.6 m/s² and 3.2 m

• -5.3 m/s² and 4.4 m

Tags

NGSS.HS-PS2-1

A firefighter slides down a pole in a fire station with an acceleration of 6.2 m/s². If the firefighter starts at rest and slides for a distance of 3.7 m, what is his final speed in m/s?

• 6.8 m/s

• 3.4 m/s

• 13.6 m/s

• 1.2 m/s

Tags

NGSS.HS-PS2-1

Assume the brakes in your car produce a constant acceleration. If you double your driving speed, how does this affect the distance needed to stop?

• The distance is the same

• The distance doubles

• The distance quadruples

• The distance halves

Tags

NGSS.HS-PS2-1

A golf ball accelerates off a tee at 15m/s², changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?

• 750 seconds
• 35 seconds
• 0.3 seconds
• 3.3 seconds

Tags

NGSS.HS-PS2-1