Asked by Precious

A catapult is used to project a stone of mass 15g vertically upwards. The rubber used in the catapult has a constant force of 30NM–1. If the rubber is stretched by a force of 30N, calculate the velocity at which the stone was projected
Answered by oobleck
PE = 1/2 kx^2 = 1/2 mv^2
you have m,k,x, so find v.
Answered by Oppong
So difficult
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