(a)[3]
Determine the two possible speeds of $Q$ after the collision.
(b)[2]
It is stated that $\lambda$ J of kinetic energy, where $\lambda > 0$, is lost in the collision. Find the value of $\lambda$.
Mathematics 9709 · AS & A Level · Momentum
Momentum — practice question
Particles $P$ and $Q$, with masses 3 kg and 5 kg respectively, start from rest on a smooth horizontal plane. $P$ is then projected directly towards $Q$ at a speed of $4\text{ m s}^{-1}$. After the collision, $P$ moves with speed $1\text{ m s}^{-1}$.