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A runner starts a 5-km race at 10:15 a.m. and finishes at 10:35 a.m. Given this information, you can calculate the runner’s
100 cm
distance/time2
100,000
average speed
1 m/s2
none of the above
5,000 cm/sec
velocity also tells direction
An airplane flies 80 km in 10 minutes and then flies 100 km in 20 minutes. The average speed of the airplane is
100 cm
distance/time2
100,000
average speed
1 m/s2
none of the above
5,000 cm/sec
velocity also tells direction
Measurements of acceleration are given in units of
100 cm
distance/time2
100,000
average speed
1 m/s2
none of the above
5,000 cm/sec
velocity also tells direction
The trunk of a certain tree is 50 cm thick. Each year it gets thicker by 1 cm. How thick will the tree trunk be in 50 years?
100 cm
distance/time2
100,000
average speed
1 m/s2
none of the above
5,000 cm/sec
velocity also tells direction
It can be important to know the velocity of an object, not just its speed, because
100 cm
distance/time2
100,000
average speed
1 m/s2
none of the above
5,000 cm/sec
velocity also tells direction
An airplane that moves 50 meters in one second has a speed of
100 cm
distance/time2
100,000
average speed
1 m/s2
none of the above
5,000 cm/sec
velocity also tells direction
A car traveling at 25 m/s speeds up to 40 m/s over a period of 15 seconds. The average acceleration of the car is
100 cm
distance/time2
100,000
average speed
1 m/s2
none of the above
5,000 cm/sec
velocity also tells direction
How many centimeters are in a kilometer?
100 cm
distance/time2
100,000
average speed
1 m/s2
none of the above
5,000 cm/sec
velocity also tells direction
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