A force acting on a 100kg mass changes its velocity from 6m/s to 2m/s in 10s. if object is displaced by a distance 10m, calculate the work done.
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Mass, m = 100 kg
Initial velocity, u = 6 m/s
Final velocity, v = 2 m/s
Time = 10 s
Displacement, x = 10 m
Acceleration, a = v-u/t
= 2 - 6 / 10
= -4 / 10
= -2/5 m/s²
Work = F . x
= m.a.x (Force = Mass × Acceleration)
= 100 × -2/5 × 10
= -400 N/m or, -400 J
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