Question

Anyone knows how to do this?

Answer 1

Blythe and Geoff are ice skating together. Blythe has a mass
of 55 kg and Geoff has a mass of 81 kg. Blythe pushes Geoff
in the chest when both are at rest, causing him to move away
at a speed of 4.5 m/s.

What is the magnitude of Blythe's speed after she pushes Geoff?

Answer 2

Oh I figured!

Answer 3

Their momentums are equivalent.

Answer 4

\(m_1v_1=m_2v_2\quad \Rightarrow \quad (55)v_1=(81)(4.5)\quad \Rightarrow \quad v_1=6.63\)