Review

Using the graph provided, how long did it a ball to roll 30 cm?  What was the average speed of the ball?

• 35 seconds, 1.17 cm/s
• 30 seconds, 1 cm/s
• 30 seconds, 1.17 cm/s
• 35 seconds, 1 cm/s

What is the formula to calculate speed?

• S = t/d
• S = d/t
• S = d x t
• S = t x d

A runner races in the 100 meter dash. It takes her 10 seconds to finish. What is her average speed?

• 10 m/s

• 1000 m/s

• 100 seconds

• 10 seconds

Which of the following is a unit of time?

• sec
• mi
• m/s
• km

Which of the following is a unit of speed ?

• sec
• mi
• m/s
• min

Which of the following is a unit of distance ?

• miles/hr
• mi
• s
• min

Which of the following is a unit of distance ?

• miles/hr
• hr
• km
• min

Which of the following is a unit of speed?

• km/hr
• hr
• km
• s

What is speed?

• how far you go
• how much distance is covered over a period of time
• how fast you accelerate
• the change in the location of a object

A person walked 10 miles.  It took them 2 hours.  How fast were they walking?

• 8 mph
• 5 mph
• 2 mph
• 10 mph