Computer Science, asked by ssamiksha1312, 3 months ago

A TV tower is 40m high. A mass of 5kg is dropped from its top. Calculate the potential energy at the top and kinetic energy just before it hits the ground.​

Answers

Answered by aleph1
2

Answer:

The Potential Energy at the top : 2000 J

The Kinetic Energy just before it hits the ground : 2000 J

Explanation:

At the top of the tower, just after dropping, the PE of the body will be maximum and KE will be 0, ie ;

 Total Energy : PE + KE

                       : mgh + 0

                       : 5 (10) (40)

                       : 2000 J

                       : 2 kJ

Now, just before it hits the ground, the KE of the body will be maximum and the PE will be zero.

 Total Energy : PE + KE

 2000 J          : 0 + KE      ( According to Law of Conservation of Energy)

⇒ KE     =   2000 J

Similar questions