8. The momentum of a hockey puck varies with time as [(0.25kgm/s)t2-(0.60kgm/s)t] +[(0.40kgm/s)t]}. (a) Calculate the...

    

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8. The momentum of a hockey puck varies with time as [(0.25kgm/s)t2-(0.60kgm/s)t] +[(0.40kgm/s)t]}. (a) Calculate the x-, and y-components of the net force acting on this puck as a function of time. (b) What are the magnitude and direction of the net force acting on it at t = 4.0 s? [8 points] 8. The momentum of a hockey puck varies with time as [(0.25kgm/s)t2-(0.60kgm/s)t] +[(0.40kgm/s)t]}. (a) Calculate the x-, and y-components of the net force acting on this puck as a function of time. (b) What are the magnitude and direction of the net force acting on it at t = 4.0 s? [8 points]