Question

A body of mass 100 kg falls from a height of 10 m. Its increase in kinetic energy is​

Answer 1

Answer:

Explanation: ________________

Answer 2

Given: A body of mass 100 kg falls from a height of 10 m.

To find: Increase in kinetic energy

Explanation: When an object is at some height the total energy in it is in the form of potential energy. When the body falls from a height below the potential energy gets converted into kinetic energy.

Mass of body(m) = 100 kg

Height(h)= 10m

g= 10 m/s^2

Potential energy= mgh

= 100* 10 * 10

= 10000 J

Since kinetic energy is equal to potential energy when it falls down, the kinetic energy is 10000 J. Kinetic energy at the highest point is zero since all the energy at that point is in form of potential energy.

Change in kinetic energy= 10000 -0

= 10000 J

Therefore, the increase in kinetic energy is 10000 J.