Question

A coolie lifts a box of 15 kg from the ground to a height of 2.0 m. Calculate the work done by the coolie on the
box. Given, g
9.8 m s-¹​

Answer 1

Explanation:

to calculate the work done calculate the potential energy

so, PE = mgh

PE = 15 × 9.8 × 2

PE = 294 Joules

Answer 2

Answer:

Explanation:

Given,

Mass of box, m = 15 kg

Height or Displacement, S = 2 m

G is given, g = 9.8 m/s²

To Find,

Work done

Formula to be used,

Work done, W = F × S

⇒ W = mg × S (As F = mg)

Solution,

Putting all the values, we get

⇒ W = mg × S

⇒ W = 15 × 9.8 × 2

⇒ W = 294 J

Hence, the work done by the coolie is 9.8 J.