Physics, asked by shikharajan04, 1 year ago

Power supplied to change the velocity of a car from 10mpersec to 5mpersec in 4 sec is 100 watt.Find the work done. if the mass of the car is 1000kg.find the kinetic energy before and after the power is supplied to it.

Answers

Answered by TPS
3
power = 100W
time = 4 sec
Work done = Pt = 100×4 = 400J


mass of car = 1000kg
KE (initial) = 1/2mv^2 = 1/2 × 1000 × 10^2 = 50000J

KE (final) = 1/2mv^2 = 1/2 × 1000 × 5^2 = 25000J
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