Q10 of 49 Page 11

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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