Am person driving a car at 108km/h saw an obstacle on the road. He braked immediately and managed to stop the car in 5 seconds. What was the acceleration of the car, assuming it to be uniform?
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Answer:
51
Explanation:
U=108km/h=255m/s.
v=0
t=5s.
By newtons first equation of motion
V=u+at
0=255+5a
a=-255/5=-51 m/s^2
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