A hockey puck, mass 0.130 kg, moving at 40.0 m/s, strikes an octopus thrown on the ice by a fan. The octopus has a mass of 0.270 kg. The puck and octopus slide off together. Find their velocity.

Answer 1

According to the Law of conservation of linear momentum for the inelastic collision
m1v=(m1+m2)u.
Then u=m1v/m1+m2=(0.13x40)/0.4=13 m/s