12. on a day when there is no wind an athlete runs a hundred metre race in 14.2 second
sketch graph showing her speed during the race is given in figure.
Speed (m/s)
Time (3)
(i) calculate the acceleration of the athlete during the first 3 second of the race.
(ii) calculate the speed with which she process the finishing line.
(iii) suggest two differences that might be seen in the graph if there had been a strong
wind opposing the runner in the race.
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Statement I: In high jump, it hurts less when an athlete lands on a heap of sand. <br> Statement II: Because of greater distance and hence greater time over which the motion of an athlete is stopped, the athlete experieces less force when lands on the heap of sand.
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