A TV tower is 40m high. A mass of 5kg is dropped from its top. Calcula

1.	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. please answer
Answer» Explanation: mass = 5 kg height = 40 m so POTENTIAL ENERGY(u) =mgh =5 4010 =2000J kinetic energy before touch the ground_ according to law of conservation of energy ( P.E)initial=kinetic energy FINAL mgh =1/2 mv. 2000=1/2 m. V. v 4000 =5.v.v v. v=800 v=28.28 so kinetic energy = 1/2 28.2828.28 =400

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. please answer

Answer»

Explanation:

mass = 5 kg

height = 40 m

=5 *40*10

=2000J

kinetic energy before touch the ground_

according to law of conservation of energy

( P.E)initial=kinetic energy FINAL

mgh =1/2 mv.

2000=1/2 m. V. v

4000 =5.v.v

v. v=800

v=28.28

so kinetic energy = 1/2 *28.28*28.28

=400