Acceleration Calculations

What is the acceleration of the sled reaches when its velocity changes from 90 m/s and then comes to a complete stop in 0.18 s.

• 500 m/s²

• -500 m/s²

• 16.2 m/s²

• -16.2 m/s²

Tags

NGSS.HS-PS2-1

A dog runs on a waxed floor at an initial speed of 1.5 m/s. It slides to a stop with an acceleration of –0.35 m/s² . How long does it take for the dog to stop?

• 3.3 s

• 0.53 s

• 0.23 s

• 4.3 s

Tags

NGSS.MS-PS2-2

The fastest elevators in the world accelerate upwards at 3.125 m/s². What is the change in speed of this elevator during a 4 second interval?

• 1.28 m/s

• 0.78 m/s

• 12.5 m/s

• 7.7 m/s

Tags

NGSS.MS-PS2-2

How much force is needed to accelerate a 3kg skateboard at 5m/s^2. 

• 8N

• 1.6N

• 0.6N

• 15N

Tags

NGSS.HS-PS2-1

A 50 kg skater pushed by a friend accelerates 5 m/s².  How much force did the friend apply? The answer to this question is most likely (HINT: Look at the units!!!) - 

• 250 N

• 250 m/s²

• 250 kg 

Tags

NGSS.MS-PS2-2

What is the force on a 1000 kg elevator that is falling freely at 9.8 m/sec²

• 102.04 n

• 9,800 n

• 980 n

• 103 n

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A 50 kg skater pushed by a friend accelerates 5 m/sec².  How much force did the friend apply?

• 45 N

• 15 N 

• 10 N

• 250 N

Tags

NGSS.MS-PS2-2

A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec².  What is the mass of the object?

• 100kg 

• 1,250kg

• 50kg

• 5kg

Tags

NGSS.MS-PS2-2

If you increase the mass on an object, its acceleration

• decreases

• stays the same

• also increases

• stops

Tags

NGSS.MS-PS2-2

If you increase the force on an object, its acceleration? 

• decreases

• stays the same

• also increases

• stops

Tags

NGSS.MS-PS2-2