Question

An object of40 kg is rise to the height 5m above the ground is the potential energy if the object is allow to fall find the kinetic energy when it is half weight down g is 10

Answer 1

• at maximum height the potential energy = mgh=40×5×10=2000j , it is also the total energy of that mass
• at half height its potential energy=mgh=40×10×2.5=1000j, and we know total energy = k.e ×p.e=constant
• so kinetic energy at half height = total energy -potential energy = 2000j-1000j=1000j

Answer 2

_/\_Hello mate__here is your answer--

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Given:-

m = 40 kg

g = 9.8 m/s^2 (sorry)

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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