Question

Calculate the work done in moving a body of mass 5kg accelerating at 2m/s^2 in moving 5m.​

Answer 1

given-

mass= 5kg

acceleration= 2m/s^2

distance = 5m

Solution-

Work = force × distance

Work = mass×acceleration × distance

Work= 5×2×5

Work= 50 J

work is measured in joules

Answer 2

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GIVEN

Mass =5 kg

Velocity =4m/s

Net force will be 0 . This is because an object moving with a uniform speed has zero acceleration, there is no change in velocity.

And according to Newton's second law of motion, we know, Acceleration is directly proportional to Force.

If acceleration =0

Force = Mass × Acceleration

Force = Mass × 0

Force = 0

work = force×distance

work=5×2×5=50J