Question

show that the total mechanical energy of a vertically projected body remains constant and it is equal to 1/2 mu∧2

Answer 1

Explanation:

Total Energy = Kinetic Energy + Potential Energy

As object move upward is velocity will decrease due to deceleration by gravity.

So its kinetic energy =

2

1

mv

2

will decrease as it move upward.

But its potential energy =mgH will increase as it move upward.

Hence, total energy will remain constant.

Answer 2

Answer:

Total Energy = Kinetic Energy + Potential Energy

As object move upward is velocity will decrease due to deceleration by gravity.

So its kinetic energy =

2

1

mv

2

will decrease as it move upward.

But its potential energy =mgH will increase as it move upward.

Hence, total energy will remain constant.