A 0.25 kg puck is initially stationary on an ice surface with negligible friction. At time t= 0, a horizontal force begins to move the puck.The force is given by (12.0  , with in newtons and t in seconds, and it acts until its magnitude is zero. (a) What is the magnitude of the impulse on the puck from the force between t = 0.500 s and t = 1.25 s? (b) What is the change in momentum of the puck between t= 0 and the instant at which F = 0?

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