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If you jump a barefooted on a hard surface, your legs get injured. But they are not injured if you jump on a soft surface like sand or pillow. Explain.
force(dt) = impulse
force =impulse/dt 0r m(v-u)/dt
finally body comes to rest in both cases but in hard surface change in momentam occures in a very small time so the force exerted by body is maximum and we get hurted ..........
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