Question

State and prove Falling bodies.​

Answer 1

Answer:

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

−O  

2

 

V  

2

=2gx

K.E=  

2

1

​  

mV  

2

 

K.E=  

2

1

​  

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=  

2

1

​  

.m.v

K.E=  

2

1

​  

.m.2gh

K.E=mgh

Thus, in all the points the energy is same.

Answer 2

Answer:

Let a body of mass 'm' placed at a height 'h' on top of the bottom, start falling down from rest. completely transformed into kinetic energy. Kinetic energy The body covers the space x with a speed v. ... (3) it's clear from equations one, two and three that the overall energy of the body remains constant at each purpose.

Step-by-step explanation:

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