Q. The swing ride is just like the pendulum,then why the swing ride did not continue to being in oscilation like pendulum.The pendulum continued oscillates whether the watch has battery or not,then why the swing ride did not continue to oscillate just like pendulum.If we stopped putting our effort or our force then the swing ride stops oscillating.................why it stops and not oscillates like the pendulum when we stops our force ????????????????? 

No pendulum can continue oscillating without the constant application of an external force.

If the pendulum does not work on a battery, then there is a spring mechanism in it or some other mechanism that keeps the pendulum oscillating.

A swing has large amount of air resistance acting on it which prevents it from oscillating continuously. Hence, it stops soon after the force has been stopped.

However, a pendulum has very less air resistance acting on it.

Hence, to conclude we can say that a pendulum and a swing are similar system and both require continuous force to be applied for continuous working.