A body of mass 10kg has a velocity of 5m/s and is brought to rest with a uniform retardation in 2sec. Calculate the workdone in losing the velocity.
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Explanation:
Given :-
- Mass - 10kg
- Velocity - 5m/s
- Time - 2 sec
Distance = 5m/s × 2sec = 10m
Acceleration = v-u/2=0-5/2=0.25m/s²
Force = ma = 0.25m/s²×10kg = 2.5 N
Work done = F×s = 2.5 × 10 = 25 Joule
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