Question

Total mechanical energy of freely falling body is constand

Answer 1

Answer:

Yes it is constant.

Explanation:

Mechanical energy =K.E + P.E

Answer 2

Answer:

Explanation:

Let the energy of particle at any height  = E

Initial energy =   1\2  mv  2  +mgH

=0+mgH=Eo

Velocity at any height = v  

∴v  2  =u  2  +2as

v  2  =0+2(−g)[−(H−h)]

=2g(H−h)

∴E=  1\2 mv  2  +mgh  

=  m\2  .2g(H−h)+mgh=mgH=E  o

​Hence constant

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