An ice hockey puck slides along the ice at 12 m/s. A hockey stick delivers an impulse of 4.0 kg * m/s causing the puck to move off in the opposite direction with the same speed.

An ice hockey puck slides along the ice at 12 m/s. A hockey stick delivers an impulse of 4.0 kg * m/s causing the puck to move off in the opposite direction with the same speed. What is the mass of the puck? Known variables: initial velocity (v1) ...