Question

Calculate the work done by a boy in lifting a 10kg laptop from the ground and keeping it on a shelf 1.5m high

Answer 1

The work will be done against the gravity.

Hence, the work done on the laptop will be equal to the change in its gravitational potential energy.

Mass of laptop = 10 kg

Height of the shelf = 1.5 m

Acceleration due to gravity = 9.8 $\frac{m}{s^2}$

Work done on the laptop = mass × gravity × height

Work done = 10 × 1.5 × 9.8

Work done = 147 Joules

Answer 2

Answer:150j

Explanation:

W= ?

M=10 kg

H=1.5m

P.E= M*G*H

P.E=10*10*1.5/10

10 10 GOT CUT BY 1

P.E=10*1.5

P.E=150j