Tuesday
March 31, 2015

Homework Help: Physics

Posted by Will on Monday, March 18, 2013 at 5:47pm.

A physics teacher (mass = 84.5 kg) is jogging through the woods and runs straight into a large oak tree at 3.5 m/s. Rebound speed is measured at 2.3 m/s in the opposite direction. If the time of contact with the tree is 45 milliseconds, what is the magnitude of the force that the tree exerts on the teacher?

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