Question

Calculate the gravitational potential energy of a body of mass 400 g when it is lifted to a height of 4m above the ground.(take g=10m/s

Answer 1

Given :-

Mass of body = 400 g

or, 0.4 kg

g = 10m/s²

Height = 4 m

Answer:-

16 j

Solution:-

Gravitational potential energy:- The energy possessed by a body due to height above from the surface of earth is called gravitational potential energy.

The formula of gravitational potential energy is given by :-

$\boxed{\sf{P_e = m.g.h}}$

Now, put the given value

$P_e = \dfrac {4}{10}\times10\times4$

$P_e = 4 \times 4$

$P_e = 16 j$

hence, gravitational potential energy is 16j.

Answer 2

Answer:

Mass of body = 400 g

or, 0.4 kg

g = 10m/s²

Height = 4 m

Answer:-

16 j

Solution:-

Gravitational potential energy:- The energy possessed by a body due to height above from the surface of earth is called gravitational potential energy.

The formula of gravitational potential energy is given by :-

\boxed{\sf{P_e = m.g.h}}

P

e

=m.g.h

Now, put the given value

P_e = \dfrac {4}{10}\times10\times4P

e

=

10

4

×10×4

P_e = 4 \times 4P

e

=4×4

P_e = 16 jP

e

=16j