Question

a girl of mass 35 kg climbs up the first floor of building at a height of 12m above the ground What will be the increase in gravitational energy​

Answer 1

Correct Question

A girl of mass 35 kg climbs up the first floor of building at a height of 12m above the ground. What will be the increase in gravitational potential energy?

Solution-

Given that, a girl of mass 35 kg climbs up the first floor at a height of 12 m above the ground.

Here, the mass (m) is 35 kg and height (h) is 12 m.

We have to find the increase gravitational potential energy.

Potential energy = mgh

Substitute the known values in the above formula

(Acceleration due to gravity i.e. g is 10 m/s²)

→ P.E. = 35 × 10 × 12

→ P.E. = 350 × 12

→ P.E. = 4200

Therefore, the increase in potential energy is 4200J.

$\rule{200}2$

Another (similar) Question

A boy of mass 20 kg is climbs up a tree of height 30 m from the ground. Calculate the potential energy.

Solution: Given that, mass (m) is 20 kg and height (h) is 30 m.

g = 10 m/s²

Potential energy = mgh

Substitute the known values

→ P.E. = 20 × 10 × 30

→ P.E. = 200 × 30

→ P.E. = 6000 J

Therefore, potential energy is 6000 J.