A long thin hockey stick is swung through an angle of 60 degrees in 0.04s from the top of the swing to the bottom of the swing. It starts from rest and the length of the stick is 1.2m. The stick has a mass of 150g and can be modeled as a long thin rod that would rotate at its end. The club only has rorational motion. When it gets down to the bottom of its swing, it hits a puck shown below. a) What is the angular velocity of the hockey right before it hits the puck? b) If 80 percent of the clubs kinetic energy is transferred to the puck what is the speed of the puck right after it is hit? (the puck travels to the right after it is hit, and has a mass of 20g) c) If the puck is in contact with the club for 6 ms, in the diagram shown below, and the puck starts from rest, what is the maximum force on the puck? The force diagram is shown below.

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.