An Athlets runs before long jump to get advantage on – (1) Inertia of motion (2) Frictional force (3) Moment of a force (4) Principle of moments

An Athlets runs before long jump to get advantage on – (1) Inertia of motion (2) Frictional force (3) Moment of a force (4) Principle of moments
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(1) Inertia of motion Explanation: An athlete does so to build up forward momentum so that when he jumps he already has a forward motion that would be greater than that of a jump made from standing in one spot. He needs forward momentum to get a good long jump and the best way is to have a running start. In this way, he gets advantage in terms of inertia of motion which is the tendency of an object to resist a change in motion.
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An athlete runs before long jump to get advantage on (1) Inertia of motion (2) Frictional force (3) Moment of a force (4) Principle of moments

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What type of frictional force works when parachuting ?

Description : What type of frictional force works when parachuting ?

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