Question

What is the energy required to lift a stone of mass 5 kg up to a height of 3m? (Please write it with full explanation)

Answer 1

Answer:   -150J

Explanation:

m = 5 kg

h = 3 m

g = -10 m/s²

By using potential energy formula

U = mgh

   =5*3*-10

U = -150J

Answer 2

Concept Introduction: Potential energy is the energy required to do anything.

Given:

We have been Given: Mass of stone is

$5kg$

Height is

$3m$

To Find:

We have to Find: Energy required to lift a stone.

Solution:

According to the problem, Potential energy is

$u = mgh$

$g = - 10m {s}^{ - 2}$

therefore,

$u = 5 \times ( - 10) \times 3 = - 150 \: joules$

Final Answer: The Potential energy required to lift the stone is

$- 150 \: joules$

#SPJ2