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anonymous
 one year ago
If a boy (m = 50kg) at rest on skates is pushed by another boy who exerts a force of 200 N on him and if the first boy's final velocity is 8 m/s, what was the contact time?
anonymous
 one year ago
If a boy (m = 50kg) at rest on skates is pushed by another boy who exerts a force of 200 N on him and if the first boy's final velocity is 8 m/s, what was the contact time?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\color{green}{\vec{F} \Delta t = m \Delta \vec{v} \\ \Delta t = \dfrac{400~\text{kg m/s}}{200~\text{kgm/s}^2}\\ \Delta t = 2~s}\]
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