Motion Review

Total distance divided by total time

• Instantaneous speed

• Average speed

• Acceleration

• None of the above

speed and direction

• distance

• displacement

• speed

• acceleration

slope on a distance v. time graph

• speed

• acceleration

• distance

• displacement

A runner jogs 60 meters on a track towards the finish line, then runs back 20 m. What is the distance and displacement?

• 60 m; 20 m

• 60 m; 30 m

• 80 m; 20 m

• 80 m; 30 m

Kim travels 300 miles in 4 hours. What is her average speed?

• 0.013 miles

• 0.013 miles/hour

• 75 miles

• 75 miles/hr

A car travels 2000 mi at a constant speed of 70 mi/hr. How long did the trip take?

• 0.035 hrs.

• 28.6 hrs

• 2070 hrs

• 14,000 hrs

Rate of change of velocity

• distance

• displacement

• speed

• accleration

What is the velocity of a truck that travels 250 miles North to NYC in 5 hours.

• 0.02 miles/hr

• 50 miles/hr North

• 50 miles/hr South

• 255 miles/hr North

How is it possible to have a constant speed but a changing velocity?

• change in direction but not speed

• change in speed but not direction

• change displacement

• It is not possible.

What does it mean if an object has a negative acceleration?

• It is speeding up.

• It is not changing speed.

• It is slowing down.

• It has constant speed.