PS Motion Review

Two objects are traveling on the same track. For 5 s, Object X has an average acceleration of 7.0 m/s/s. If Object Y has an initial velocity of 0 m/s and a final velocity of 25 m/s after 5 s, how does its acceleration compare to Object X’s?

• The average acceleration of Object X is greater than Object Y by 2.0 m/s/s.

• The average acceleration of Object X is greater than Object Y by 4.0 m/s/s.

• The average acceleration of Object X is greater than Object Y by 12.0 m/s/s.

• The average acceleration of Object X is greater than Object Y by 0.5 m/s/s.

Jeremy walked at an average rate of speed of 5 kilometers per hour (km/h). How far had Jeremy walked in 30 minutes?

• 5 km

• 2.5 km

• 1 km

• 10 km

Over a period of 2.50 seconds, a speedboat accelerates uniformly from 18.5 m/s to 46.5 m/s. What is the acceleration of the speedboat relative to the shore?

• -28.2 m/s²

• 28.2 m/s²

• -11.2 m/s²

• 11.2 m/s²

Which information does a student need to differentiate between the speed and the velocity of a vehicle in motion?

• the rate of the motion

• the direction of motion

• the change in the amount of motion

• the amount of distance traveled during motion

A car accelerates from 15 m/s to 60 m/s in 30 seconds.  What is its acceleration?

• 2 m/s2
• 3 m/s2
• 1.5 m/s2
• 0.75 m/s2

Tags

CCSS.8.EE.C.7B

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Tags

CCSS.8.EE.B.5

At 60 seconds, how far had this object traveled? 

• 0 m
• 10 m
• 20 m
• 40 m

Tags

CCSS.8.EE.B.5

Which graph represents the greatest acceleration?

• A
• B
• C
• D

Tags

CCSS.8.EE.B.5

In which of the following graphs (click the image) are both runners moving at the same speed (note that graph c is the bottom right graph, and graph d is the bottom left graph)? 

• Graph A
• Graph B
• Graph C
• Graph D

Tags

CCSS.8.EE.B.5

Which chart is correct for the problem: "A car accelerates from 20 m/s to a stop in 4 seconds. Determine acceleration?"

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1