A car moving along a straight highway with speed of 72 kmph to brought to stop within a distance of 50 m What is the retardation of the carand how long does it take for the car to stop?
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Answer:
Explanation:
u =72 km /h
= 20 m/s
v=0
s =100m
v^2-u^2= 2as
-u^2= 2×a×100(v=0)
- 20^2=200a
-400=200a
a=-2 m/s^2
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