Question

A 100kg vehicle moving with a speed of 20m/s is brought to rest in a distance of 50 metres.Find the acceleration and calculate the unbalanced force action on the vehicle

Answer 1

As vehicle stop
V=0
2as=v²-u²
a=-400/100
a=-4m/s²
F=ma
=100×-4m/s²
=-400N
The force is in the opposite direction of motion
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Answer 2

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