Question

a body of mass 4 kg is moving in a circle of radius 10cm with a constant speed 20cm/sec. calculate the work done in moving the body over half the circumference of the circle
​

Answer 1

w = F × s

F = m × a 4×0.2= 0.8N

distance = 2 × 22÷7×0.1 = 0.62 m

work done = 0.8N × 0.62m =0.496 J