certain force acting on a 20 kg mass changes its velocity from 5 metre per second to 2 metre per second calculate the work done by the force
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Explanation:
Force = mass × acceleration
By unit of force
Unit = kg m/sec² = Newton (N)
Work = Force × distance
Unit = Nsec = Newton second
= kg m/sec
Hence work is directly proportional to Mass and velocity.
Since Work = mass × velocity
Work1 = 20 × 5 = 100 Ns
Work2 = 20 × 2 = 40 Ns
Hence work done by W1 to W2 is
= 100 - 40 = 60 Ns
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