Physics, asked by Nsgk, 11 months ago

Derivation of law of conservation of energy class 9

Answers

Answered by aabhak01
31

Answer:

Explanation:

Law of conservation of energy states that:−

Energy can neither be created nor be destroyed.

Energy transforms from one form to another form and, potential energy+ kinetic energy= constant

Proof:−

At point A

K.E=0m/s

P.E=mgh

P.E=mgh

At point B,

K.E.,

2gh=V ^2- 0^2

v^2=2gx

K.E=1/2 mv^2

K.E=1/2m.2gx

K.E=mgx-----------------------------(1)

P.E=mgh

P.E=m.g.(h−x)

P.E=mgh−mgx---------------------(2)

from(1) and (2)

K.E+P.E constant

mgx+mgh−mgx=mgh

mgh=mgh

At point C,  

P.E=0

2gh=v^2-u^2 ( initial velocity =0 m/s)

2gh=v^2

K.E=1/2.m.v

K.E=1/2.m.2gh

K.E=mgh

Thus, in all the points the energy is same.

Answered by ItsBranliestKing
2

Answer:

right answer

Explanation:

thus we coculde that energy is same at every point

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