Acceleration

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

• 750 s

• 35 s

• 0.3 s

• 3.3 s

Tags

NGSS.HS-PS2-1

A ball of clay is thrown at a wall at a velocity of 28 m/s. After it hits the wall, it takes 0.02 s to stop. What is the acceleration of the clay when it hits the wall?

• 1400 m/s²

• -1400 m/s²

• 0.56 m/s²

• -0.56 m/s²

Tags

NGSS.HS-PS2-1

A box sliding down an inclined plane attains a velocity of 27 m/s in 3 s from rest. Find the acceleration.

• 30 m/s²

• 24 m/s²

• 9 m/s²

• 81 m/s²

Tags

NGSS.HS-PS2-1

A dog runs with an initial speed of 7.5 m/s on a waxed floor. It slides to a stop in 15 seconds. What is the acceleration?

• 0.5 m/s²

• -7.5 m/s²

• -0.5 m/s²

• 7.5 m/s²

Tags

NGSS.HS-PS2-1

The picture of the position vs. time graph shows an object that is

• accelerating and speeding up.

• moving at a constant speed.

• not moving.

• accelerating and slowing down.

Why does a car accelerate as it rounds a corner at a constant speed?

• Its direction changes.

• It doesn't.

• It slows down.

• Its speeds up.

Tags

NGSS.HS-PS2-1

Acceleration only takes place when things speed up. 

• True
• False

Tags

NGSS.HS-PS2-1

In each of the following cases, determine where the car has no acceleration.

• A car shortly after a stoplight turns green.

• A car approaching a red light.

• A car with the cruise control set at 80 km/h.

• A car turning a curve at a constant speed.

Tags

NGSS.HS-PS2-1

Which graph represents zero acceleration (constant velocity)?

• A

• B

• C

• D

Which graph represents the greatest acceleration?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1