Question

An object of mass 40 kg is raised to a height of 5 M what is its potential energy if the object is allowed to fall find its kinetic energy when it is Halfway down

Answer 1

hey dearie ..here is your answer...


P.E. at top =mgh
=40×5×9.8
=1960 J

P.E when half way down= mgh
=40×2.5×9.8
=980J

and we know that loose in potential energy is refers to an equal increase in the kinetic energy...So the kinetic energy also be 980J

Answer 2

_/\_Hello mate__here is your answer--

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Given:-

m = 40 kg

g = 9.8 m/s^2

h = 5 m

We know that,

potential energy = mgh

= 40 × 9.8 × 5 J

= 1960 J

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♦♦The total mechanical energy (Kinetic and potential energy) of an object remains constant. (law of conservation of energy)

Therefore, when the object is half-way down, its potential energy become half the original energy and remaining half converted into kinetic energy.

Hence, the kinetic energy = ½ (1960) J = 980 J

I hope, this will help you.☺

Thank you______❤

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