Tar would a car move in 4.8 s if its velocity changed from 14.0 m/s to 16.0 m/s? 6. What is the displacement of a car accelerating from 15 m/s forward to 10 m/s forward in 8.0 s?
7. Apollo 10's re-entry speed was 39 897 km/h. How many seconds would it take the spacecraft to stop in a
distance of 3.0 x 10 m.
8. The speed of light is 3.0 x10 m/s. The speed of sound is 344 m/s. A flash of lightening occurs in a storm 1.0
x10 m away. How many seconds does it take for us to see the lightning and hear the thunder?
9. How long will it take a laser beam to go to the moon and back if the distance to the moon is 3.8 x108 m?
10. Jules Verne wrote a book called Around the World in Eighty Days. What was his average speed in m/s and
km/h if the radius of the Earth is 6400 km?
11. What was the initial velocity of an object that moved 100 m in 5.60 s reaching a final velocity of 15.0 m/s in
that time? Was the object speeding up or slowing down?
Acceleration
12. If Donovan Bailey reaches a top speed from rest of 10.2 m/s in 2.5 s what is his acceleration?
13. If a sprinter accelerates at 2.2 m/s2 for 2.5 s what is her velocity after this time assuming initial v=0 m/s?
14. If it take 0.08 s for an airbag to stop a person what is the acceleration of a person moving 13.0 m/s and
coming to a complete stop in that time?
15. A fastball pitcher can throw a baseball at 100 km/h. If the windup and throw take 1.5 s what is the
acceleration of the ball?
16. A car moving at 10 m/s north ends up moving 10 m/s south after a period of 12 s, what is its acceleration?
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