Average Acceleration

An object travels a distance of 12.8 m in 15 seconds. What is its average velocity?

• 15 m/s
• 12.8 m/s
• 0.85 m/s
• 1.17 m/s

A bike travels at a constant speed of 4 m/s for 5 seconds. How far does it go?

• 4 m
• 10 m
• 20 m
• 1.5 m

A ball starts rolling up a slanted hill. It starts with a velocity of 2.5 m/s up the hill, slows down for 5 s, stops for an instant, and then rolls back down the hill. Assuming that the positive direction is up the hill, what is the sign of the ball's acceleration as it is slowing down?

• Positive
• Negative

Tags

NGSS.HS-PS2-1

A ball starts rolling up a slanted hill. It starts with a velocity of 2.5 m/s up the hill, slows down for 5 s, stops for an instant, and then rolls back down the hill. Assuming that the positive direction is up the hill, what is the sign of the ball's acceleration as it is rolling back down the hill?

• Positive
• Negative

Tags

NGSS.HS-PS2-1

A ball starts rolling up a slanted hill. It starts with a velocity of 2.5 m/s up the hill, slows down for 5 s, stops for an instant, and then rolls back down the hill. Assuming that the positive direction is up the hill, what is the magnitude of the ball's average acceleration as it rolls up the hill?

• 0.125 m/s²
• 0.25 m/s²
• 0.5 m/s²
• 0.75 m/s²

Tags

NGSS.HS-PS2-1

A golf ball rolls up a hill towards the hole. If the golf ball starts with a speed of 2 m/s and slows at a constant rate of 0.5 m/s², what is its velocity after 2 s?

• 0 m/s
• 0.5 m/s
• 1 m/s
• 1.5 m/s

If a car accelerates from rest at a constant 5.5 m/s², how long will it take for the car to reach a velocity of 28 m/s?

• 5.1 s
• 33.5 s
• 56.1 s
• 154 s

Tags

NGSS.HS-PS2-1

If the average speed of a car is 110 km/h, how long will it take the car to travel 715 km?

• 6 h
• 6.5 km/h
• 6.5 h

Kira jogs to a store 72 m away in a time of 36 s. What is Kira's average speed?

• 0.5 m/s
• 2 m/s
• 2 h

If you slow down on your bicycle, you accelerate.

• TRUE
• FALSE

Tags

NGSS.HS-PS2-1