# A 0.115-kg hockey puck, moving at 35.0 m/s, strikes a 0.265-kg octopus thrown onto the ice by a hockey fan. The puck and octopus slide off together. What is their velocity?

Jan 29, 2017

I got $10.6 \frac{m}{s}$.

[No octopus was armed in the solution of this question!]

#### Explanation:

This should be an inelastic collision where the two bodies, after impact, stick together forming one object having the mass composed by the sum of the individual ones.
I assume that the octopus, at the moment of impact, is at rest.

Using our data we get:
$V = \frac{0.115 \cdot 35}{0.115 + 0.265} = 10.6 \frac{m}{s}$