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CBSE Class 10 Answered

Athletes in pole jump events fall on the cushoined surface and not on the floor. why ?
Asked by kishor.kp14 | 24 Jul, 2019, 09:22: PM
answered-by-expert Expert Answer
When athlete falls on ground with momentum, he makes a short contact time with ground and
within this shrt contact time momentum comes to zero. This change of momentum in very short time gives
high impulsive force to ground. By Newton's third law equal reaction force from ground will act on athlete and hurt him.
 
Instead of falling on ground, if he falls on cushioned surface, impulsive force passed to the cushion and
cushion absorbs appreciable part of force and negligible reactive force will act on athlete. Hence he will not get hurt
Answered by Thiyagarajan K | 24 Jul, 2019, 10:31: PM

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