Question: You have been asked to help evaluate a proposal to build a device to determine the speed of hockey pucks shot along the ice. The

You have been asked to help evaluate a proposal to build a device to determine the speed of hockey pucks shot along the ice. The device consists of a rod which rests on the ice and is fastened to the ice at one end so that it is free to rotate horizontally. The free end of the rod has a small, light basket which will catch the hockey puck. The puck slides across the ice perpendicular to the rod and is caught in the basket which is initially at rest. The rod then rotates. The designers claim that knowing the length of the rod, the mass of the rod, the mass of the puck, and the frequency of the rotation of the rod and puck, you can determine the speed of the puck as it moved across the ice.

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