Vi = \underline{4.8 \text{ m/s}}
4. A hockey puck, mass \underline{0.115 \text{ kg}}, moving at \underline{35.0 \text{ m/s}}, strikes an octopus thrown on the ice by a fan.
The octopus has a mass of \underline{265 \text{ g}}. The puck and octopus slide off together. Find the speed. (Yes,
there truly are hockey fans that throw octopuses on the ice. Isn't life strange?)