work done in moving a body of mass m to increase its velocity from 5ms to 8ms is
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Answered by
1
w=F*S
w=m*v^2
w=m(8^2-5^2)
w=39m
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3
Given,
Mass of the object = m
Initial velocity 'u' = 5 m/s
Final velocity 'v' = 8 m/s
To find,
Work done in moving a body
Solution,
Work done in moving a body of mass m = change in kinetic energy
Kinetic Energy = 1/2 m(v²-u²)
= 1/2 m (64-25)
= 1/2 m (39)
= 19.5m Joules
Hence, work done in moving a body of mass m to increase its velocity from 5 m/s to 8 m/s is 19.5m Joules.
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