Question

4.An object of 40Kg is raisedto a height of 5m above the ground .What is its Potential energy ?If the object is allowed to fall .Find its Kinetic energy when it is half way down​

Answer 1

Answer:

Gravitational potential energy is given by the expression,

W = m g h

Where,

h = Vertical displacement = 5 m

m = Mass of the object = 40 kg

g = Acceleration due to gravity = 9.8 m sˆ’2

ˆ´ W = 40 — 5 — 9.8 = 1960 J.

At half-way down, the potential energy of the object will be 1960/2= 980 J.

At this point, the object has an equal amount of potential and kinetic energy. This is due to the law of conservation of energy. Hence, half-way down, the kinetic energy of the object will be 980 J.

Explanation:

mark me as brainliest