Motion review

A cart was allowed to roll down a ramp from rest. It reached the bottom of the ramp with a speed of 25 cm/s. A student could conclude that the cart —

• gained mass

• moved at a constant speed

• accelerated down the ramp

• lost energy

Check all of the values need to calculate speed

• distance traveled

• time to cover distance

• acceleration during travel

• number of direction changes

Check all of the values needed to calculate acceleration

• starting velocity

• ending velocity

• time to increase speed

• number of people involved

A car traveled 240 km in 3 hours. What was its average speed in km per hour?

• 40 km/hr

• 80 km/hr

• 120 km/hr

• 720 km/hr

Which of the following is NOT an example of acceleration?

• starting from rest and moving forward

• slowing to a stop

• moving along a curve at a constant rate of 23 km/hr

• moving in a straight line at a constant rate of 23 km/hr

Which of the following is not an acceptable unit of measure for speed and velocity?

• meter per second (m/s)

• Miles per hour (mph)

• kilometers per hour (km/hr)

• Meter per second squared (m/s²)

m/s² means _____

• meter per second times 2

• meter per second squared

• meter per second

• meter times second squared

m/s² is the unit to measure

• time

• acceleration

• speed and velocity

• direction

While recording the time and distance covered by her toy train, Helga observed the train move with a constant speed until it got to the corner of the track and got stuck. Which graph best shows the motion of the train while Helga was observing?

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A motorcycle travels at 6.0 m/s. After 3.0 seconds, the motorcycle travels at 15.0 m/s. Which of the following was the average acceleration of the motorcycle?

• 2.0 m/s²

• 3.0 m/s²

• 5.0 m/s²

• 7.0 m/s²