Question

proof Law of conservation of energy.​

Answer 1

Answer:

Hey!

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=V2

−O2V2

=2gx

K.E= 21

mV2

K.E= 21

m.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= 21

.m.v

K.E= 21

.m.2gh

K.E=mgh

Thus, in all the points the energy is same.

Hope it will be helpful ✌️

Answer 2

according to the law of conservation of energy

energy can neither be created now be destroyed

for example

a boy is climbing a hill

while going upwards his energy would be KE

at the top of the hill KE gets converted into PE

and again while going down PE gets converted into KE

so we can see energy gets converted but remains conserved

here PE is potential energy

KE is kinetic energy

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