CAPE Physics Unit 1 · 2007 · Paper 1 · Question Q13

A slingshot is a child's toy that converts the strain energy of the stretched material into the moving energy of the propelled object. A boy pulls on his slingshot with a force of 20\text{ N} and it extends by 7\text{ cm}. At what velocity does the 20\text{ g} stone fly off?

1. (A)8.4\text{ m s}^{-1}
2. (B)70\text{ m s}^{-1}
3. (C)16.7\text{ m s}^{-1}
4. (D)2.6\text{ m s}^{-1}