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С осу.Q.4. Certain force acting on a 20 kg masschanges ts velocity from 5 m s-1 to 2 m s-1.Calculate the work done by the force.​

Answer»

Step-by-step EXPLANATION:

initial velocity = 5m/s

final velocity = 2m/s

The WORK done is equal to the change in the kinetic energy of an object

W = 1/2 ×m(v²-u²)

W = 1/2 ×20×(5²-2²)

W=10×25-4

W=10× 21

W=210joules

therefore, the work done by force =210joules



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