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If an object is accelerated from rest to 4 meters per second by 30 N force acting on it over a distance of 6 meters what is the mass of the object?
Wiki User
∙ 14y ago
22.5 kg
The work-energy theorem states:
Net work = change in kinetic energy
force x distance moved along the direction of the force= change in kinetic energy
Wnet = KEf - KEi = DKE.
Work= (30N)x(6m)x (cos0)=180J
final kinetic energy= 0.5(mass)(velocity^2)= 0.5x(4^2)x m
The initial kinetic energy is 0 (because the object is initially at rest, that is with zero velocity)
--> 180= 8m -0
m (mass)= 22.5 kg
Wiki User
∙ 14y ago
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