Answer:
Mechanical energy  = 3.92 J
exactly 3.92 j
Explanation:
As we know that mechanical energy is sum of kinetic energy and potential energy of the system
so here we can say that mechanical energy is sum of kinetic energy of ball and its potential energy
Since ball is at rest so kinetic energy of the ball must be ZERO
Now for potential energy we know that
[tex]U = mgh[/tex]
now we know
m = 0.2 kg
h = 2 m
now for potential ene'rgy
[tex]U = (0.20)(9.8)(2)[/tex]
[tex]U = 3.92 J[/tex]
so mechanical energy is given as
Mechanical Energy = 3.92 + 0 = 3.92 J
