ssuereichard
14.10.2020 •
Physics
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?
to rost what was
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Ответ:
the more chicken soup you add to the water the lower the pH scale goes to being acidic. chicken soup has the pH of 5.8 and water is neutral meaning it has a pH scale of 7.