a car of mass 2400kg moving with a velocity 30m/s is stopped in 10 seconds by applying brakes. calculate the retardation and regarding force
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Answer:
retardation = -3m/s² and force = 7200 N
Explanation:
mass of the car[m] = 2400 kg
initial velocity [u] = 30m/s
final velocity [v] = 0m/s [ as car came to rest]
time taken [t] = 10 sec
now, retardation = final velocity - initial velocity/time [retardation = negative acceleration]
= 0-30/10 =-3m/s²
so force = mass × acceleration
= 2400kg × -3m/sec² = 7200 N [force act in opposite direction of motion]
hope it helps you very well
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