Question

A vehicle of mass 100kg is moving with a velocity 10m/s.the force required to bring it to rest in 1/5 second will be

A)500N
B)-500N
C)-5000N

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Answer 1

Answer:

answer is 500N

first find out the kinetic energy gain by vehicle by using formulae 1/2mv^2

velocity = 10

mass=100Kg

kinetic energy=5000

then use the formulae

kinetic energy =Force*velocity

velocity is given 10

kinetic energy=5000

hence force =500N