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Q.

A high pressure tyre rolls more easily than a low pressure tyre because

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a

Friction is more in high inflated tyre

b

Friction is zero in high pressure type

c

Friction is less in high inflated tyre

d

None

answer is A.

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Detailed Solution

Rolling resistance is the energy that is lost when the tire is rolling. The main reason for the loss of energy is the constant deformation of the tire. Lower pressure in tyres results in more flexing of sidewalls which increase the deformation and damping thus produces higher rolling resistance.

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