Question

11. Calculate the change in potential energy
when a bag of mass 12 kg is raised from a
point A situated at 3.0 m height to another
point B situated at 15.0 m height from the
ground. (Take g = 10 m/s2)​

Answer 1

Answer:

When an object is dropped from a height, its gravitational potential energy is converted to kinetic energy as it falls.

The loss in potential energy will be equal to the gain in kinetic energy.

We can simply calculate the gravitational potential energy lost using the formula Ep=m⋅g⋅h :

⇒Ep=((20)⋅(9.81)⋅(10)) J

=1962 J

Therefore, the maximum kinetic energy attained by the object is 1962 J.

Answer 2

Answer:

Given :

mass =12 kg

point A height=3m

point B height=15m

g=10m/s²

Explanation:

To Find potential energy

point A p.e= Mgh

12x3x10=360 J

for point B p.e= Mgh

12x15x10=1800J

change in potential energy= Point b-Point a

1800-360 J

1440Joule