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Examples of newton's second law of motion.

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  1. If you jump from a height on a hard floor, you can hurt your feet because the feet come to rest in a very short time, and hence, the force exerted on your feet by the floor is very high. That is why athletes doing high jump land on sand or foam as it increases the time in which the body comes to rest. The sand gives way, allowing the body to slow down gradually. which decreases the force on the body, and the landing is comfortable.
  2. It is easier to catch a fast-moving cricket ball by pulling back your arms while taking the catch allowing you to catch the ball by applying a small force on it. If you keep your arms still as you catch the ball, you have to apply a much larger force on the ball. The durations for which the forces are applied are also different in the two cases. When you pull your arms back with the ball, you apply a smaller force for a longer time because the ball stops completely only when your hands stop. In the second case, the ball stops almost immediately as it hits your still hands. You have to apply a larger force for a lesser time.
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shubham.krishnan

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