Changing Velocity

"4.5 m/s forward" counts as a velocity because it has an amount and direction. Select all of the following that counts as a different velocity.

• 4.5 m/s backward

• 5.5 m/s forward

• 0 m/s

• 3.5 m/s forward

"4.5 m/s forward" counts as a velocity. Select all of the following that counts as the same speed.

• 3.5 m/s forward

• 4.5 m/s to the left

• 4.5 m/s backward

• 0 m/s

Tags

NGSS.MS-PS3-1

If a runner starts from rest and accelerates forward at 14 m/s² for 0.75 s, how fast will they wind up going?

• 18.7 m/s

• 10.5 m/s

• 14 m/s

• 13.25 m/s

Tags

NGSS.HS-PS2-1

How much time does a car need to go 27 m/s faster if it has an acceleration of 7.2 m/s²?

• 0.27 s

• 19.8 s

• 194 s

• 3.75 s

Tags

NGSS.HS-PS2-1

A ship going 4.4 m/s forward takes 530 s to slow down to rest. What acceleration does the ship have?

• -0.008 m/s²

• -120 m/s²

• 0.008 m/s²

• 2332 m/s²

Tags

NGSS.HS-PS2-1

Select all of the following that acceleration can do:

• Make something go faster

• Make something go slower

• Make something change direction

• Make something stop

Suppose a cart is moving at 5.3 m/s when we fist see it, and it accelerates at -3.8 m/s². What is the cart's velocity 1.1 s later?

• -4.18 m/s

• 1.5 m/s

• 1.12 m/s

• 4.82 m/s

Tags

NGSS.MS-PS2-2

Suppose a car moving at 37 m/s hits the brakes and accelerates at -4.7 m/s². The brakes are applied for 4.3 s. What is the average velocity of the car during this time?

• 26.9 m/s

• -20.21 m/s

• 16.79 m/s

• -174 m/s

Tags

NGSS.MS-PS2-2

A child on a ride has a positive velocity. Select all of the possible results of applying a negative acceleration.

• The child comes to a stop.

• The child moves forward with less speed.

• The child moves backward with less speed.

• The child moves backward with more speed.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

A beagle runs with a velocity of +5.6 m/s. A pug runs by with a velocity of -8.5 m/s. Which of the following statements are true?

• The beagle has more speed.

• Their speeds cannot be compared.

• The pug has a higher velocity.

• The pug has more speed.

Tags

NGSS.MS-PS3-1