Question

A women does 500 J of work in lifting a bucket of 20 kg from a well. Calculate the height up to which the bucket is raised by her. Take g = 10 m/sq sec

Answer 1

Explanation:

Let the height of the bucket she raised be h.

From energy conservation,

Work done by her= Change in Potential energy of the bucket

=> 20×10×h = 500 J

=> h = 5/2 = 2.5

Answer 2

Answer:

2.5 metres.

Explanation:

Work done = Force × Displacement

Force can be taken as mass × gravity

g = 10m/s²

m = 20kg

So,

500J = (20 × 10) × Displacement

500J = 200 × Displacement

500/200J = Displacement

Displacement = 2.5 Metres