Speed Distance Time

What is speed?

• An object's distance and direction from a reference point.

• The distance an object travels in a period time.

• The change in velocity during a period of time.

• The process of changing position.

What is the formula for speed?

• distance / time

• time x distance

• distance + time

• time / distance

What is Usain Bolt’s record in the 100 metre race?

• 375 s

• 10.44 s

• 9.58 s

• 11.38 s

What was Usain Bolt’s speed in that 100 metre race? If you don't remember, do some math; the distance is 100 m and the time 9.58 s.

• 12.41 m/s

• 9.58 m/s

• 10.44 m/s

• 10.86 m/s

What is the speed of a Formula 1 car? If you are not so sure, crunch some numbers; the distance is 375 km and the time 1 hour.

• 375 km/h

• 1000 m / 60 sec x 60 min

• 10.44 m/s

• 9.58 m/s

If you compare both Usain Bolt’s (10.44 m/s) and the Formula 1 car (375 km/h) speeds, why can’t you tell at first sight who is faster?

• Because you cannot compare the speeds of a human and that of a machine.

• Because the units of volume are not the same.

• Because the units of heat are not the same.

• Because the units of speed are not the same.

What you need to do to transform 375 km/hr to m/s?

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In order to change 375 km to meters (m), what do you need to do?

• 375*60

• 375/1000

• 375*1000

• 375/60

To transform 1 hour to seconds, what steps are required?

• 1(1000)(60)

• 1/(60)(60)

• 1(60)(60)

• 1/(1000)(60)

What is the equivalence of 375 km/h in m/s? Consider the following and do some calculations: the time is 3600 s and the distance is 375000 m.

• 104.2 m/s

• 375 m/s

• 10.44 m/s

• 9.58 m/s