Ncert solutions

Ncert solutions

Grade 8

Friction | Exercise

Question 10

Q10) Explain why objects moving in fluids must have special shapes.

Solution:

Special shapes experience less fluid friction, therefore, can move easily through fluids.

In the case of the ship when it is moving through the water, the sea will exert some drag. This drag opposes the motion of the ship. In order to overcome this drag, the ship has to apply a lot of force. This will result in a waste of energy. Keeping all these things into consideration the shape of the ship is made in such a way that it experiences less fluid friction i.e. drag.

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subject-cta

Question 10

Q10) Explain why objects moving in fluids must have special shapes.

Solution:

Special shapes experience less fluid friction, therefore, can move easily through fluids.

In the case of the ship when it is moving through the water, the sea will exert some drag. This drag opposes the motion of the ship. In order to overcome this drag, the ship has to apply a lot of force. This will result in a waste of energy. Keeping all these things into consideration the shape of the ship is made in such a way that it experiences less fluid friction i.e. drag.

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subject-cta
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