Recall some of your experiences. A ball rolling along the ground gradually slows down and finally comes to rest. When we stop pedalling a bicycle, it gradually slows down and finally comes to rest once its engine is switched off. Similarly, a boat comes to rest if stop rowing it. Can you add some more such experiences? What causes a change in their state of motion? Can you guess the direction in which the force must be acting in each case?

Recall some of your experiences. A ball rolling along the ground gradu

1.	Recall some of your experiences. A ball rolling along the ground gradually slows down and finally comes to rest. When we stop pedalling a bicycle, it gradually slows down and finally comes to rest once its engine is switched off. Similarly, a boat comes to rest if stop rowing it. Can you add some more such experiences? What causes a change in their state of motion? Can you guess the direction in which the force must be acting in each case?
Answer» Answer :Some more such experiences are :(i) A FAN stops moving when the switch is turned off.(II) A top stops moving after ROTATING on the floor for sometime.