A car is moving with speed 54km/h. It stop in 5m after applying the breaks. find the force on the car by the road. If mass of the car is 200kg.
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u = 54 km/h = 15 m/s
v = 0
t = 5 sec
m = 200 kg
F = ?
a = (v-u)/t = (0-15)5 = -75 m/s^2
F = ma
= 200 × -75
= - 15000 N
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