Q. 10

# Certain force acting on a 20 kg mass changes its velocity from 5 m s-1 to 2 m s-1. Calculate the work done by the force.

Given,

Energy consumed = 250 units

= 250 kWh

We know that,

1 kilowatt-hour = 3.6 × 106 J

250 kilowatt-hours = 3.6 × 106 × 250

= 9 × 108 J

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