Name: Muscular Force
Uploaded: 2019-07-19
Duration: 1 min 42 s
Description: To do things such as pushing and pulling, we exert force on the objects. Did you know that our muscles are the one that exerts this force? Watch this video a...

Question

Take a long rubber band and cut it at one point. At one of its ends tie a clean washed stone or a $50 g$ weight as shown in the figure. Explain the observations in this experiment according to the Archimedes Principle.

Question Image

Accepted Answer

Take a long rubber band and cut it at one point. At one of its ends tie a clean washed stone or a $50 g$ weight as shown in figure Now hold the other end of the rubber band and make a mark there. Keep the stone hanging in the air and measure the length of the rubber band from the stone to the mark made earlier. Now take water in a pot and hold the rubber band at such a height that the stone sinks in it. Again, measure the length of the rubber band up to the mark.

Observation: This length is shorter than the earlier length. While dipping the stone in water, the length of the stretched rubber gets slowly reduced and is minimum when it sinks completely.

Reason: When the stone is sunk in the water, a buoyant force acts on it in the upward direction. The weight of the stone acts downwards. Therefore, the force which acts on it in the downward direction is effectively reduced.

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