Draw a diagram to show conservation of mechanical energy is case of a free falling body. `(AS_(5))`

Write the law of conservation of mechanical energy

Explain the conservative of mechanical energy for a free fall body .

Write law of conservation of mechanical energy. Write an example.

State and establish principle of conservation of mechanical energy .

Write a principle of non - conservative force for mechanical energy .

Show that the law of conservation of mechanical energy is obeyed by pulling or compressing the block tied at the end of a spring (a)

A ballon filled with helium rises against gravity increasing its potential energy . The speed of thee ballon also increases as it rises . How do you reconcile this with the law of conservation of mechanical energy ? You can neglect viscous drag of air and assume that density of air is constant .

Assertion:- A body may gain kinetic energy and potential energy simultaneously. Reason:- Conservation of mechanical energy may not be valid every time.

Which of the diagram shown in figure represents variation of total mechanical energy of a pendulum oscillating in air as function of time?