200 kg car traveling at 10 m/s hits a tree and is brought to rest in 0.10 s. What is the magnitude of the average force acting on the car to bring it to rest?
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Given:
mass (m) = 1200 kg,
final velocity (v ) = 10m/sec
initial velocity (u) = 0
time (t) = 1 sec
u = v + a ⋅ t
u = 10 + a . 1
a = 100 m/ sec
we know that,
F = m x a
F = 1200 x 100, ==> F = 120000 N ( 1.2x10^5 )
Explanation:
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