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Apply Physics to Collision Design Practice Test
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Q1
A playground surface must reduce injury risk for a child falling from 2.0 m. Assume the child’s speed on impact is $v = \sqrt{2gh}$ and the child’s mass is 25 kg. The safety goal is to keep the average deceleration below $50\ g$. Using $a_{avg} = v^2/(2d)$ (from work-energy/kinematics), what minimum stopping distance $d$ should the surface provide?
A playground surface must reduce injury risk for a child falling from 2.0 m. Assume the child’s speed on impact is $v = \sqrt{2gh}$ and the child’s mass is 25 kg. The safety goal is to keep the average deceleration below $50\ g$. Using $a_{avg} = v^2/(2d)$ (from work-energy/kinematics), what minimum stopping distance $d$ should the surface provide?