Physics, asked by 01aaradhya, 1 year ago

an object of mass 40 kg is raised to a height of 5m above ground. If object is allowed to fall, find its Kinetic energy when it is half way down. Find its Mechanical energy as well.


Anonymous: use the formula Mgh

Answers

Answered by madhu100
4
mechanical energy = mgh = 40×10×5 =2000J
P. E + K. E = 2000J
at half way
P. E + K. E = 2000
40×10×2.5 + KE =2000J
K. E =1000 J

madhu100: as at the highest point no kinetic energy is there only p. e is there
01aaradhya: achha
01aaradhya: tysm
01aaradhya: ^_^
madhu100: wlcm
madhu100: :) dear
madhu100: by the way which class question is this
madhu100: ??
01aaradhya: 9th class
madhu100: okk
Answered by Anonymous
4

_/\_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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