a car is running at the rate of 54 km per hour suddenly the driver applies brakes and stop the car within a distance of 7.5 m. what is the acceleration produced by the brakes? assume that the acceleration is uniform one
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Solution:-
given by :-
》u = 54k/h = 54×5/18 = 15m/s
》v = 0 , s = 7.5m
by formula:-
》v^2 -u^2 = 2as
》0- 15^2 = 2×7.5a
》-225 = 15a
》a = -225/15
》( a = -15m/s^2)
a is negetive bcoz it apllied opp. side
acceleration produced by the brakes
=( 15m/s^2)ans
》
given by :-
》u = 54k/h = 54×5/18 = 15m/s
》v = 0 , s = 7.5m
by formula:-
》v^2 -u^2 = 2as
》0- 15^2 = 2×7.5a
》-225 = 15a
》a = -225/15
》( a = -15m/s^2)
a is negetive bcoz it apllied opp. side
acceleration produced by the brakes
=( 15m/s^2)ans
》
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