Friday
July 25, 2014

Homework Help: PHYSICS

Posted by AAKa on Saturday, December 7, 2013 at 2:28am.

A merry-go-round (pictured) is sitting in a playground. It is free to rotate, but is currently stationary. You can model it as a uniform disk of mass 190 kg and radius 100 cm (consider the metal poles to have a negligible mass compared to the merry-go-round). The poles near the edge are 90 cm from the center.

Someone hits one of the poles with a 8 kg sledgehammer moving at 18 m/s in a direction tangent to the edge of the merry-go-round. The hammer is not moving after it hits the merry-go-round.

How much energy (modulus of (deltaE)) is lost in this collision? (enter a positive number for the absolute value in Joules)

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