| Exam Board | Edexcel |
|---|---|
| Module | M2 (Mechanics 2) |
| Session | Specimen |
| Marks | 5 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Momentum and Collisions |
| Type | Collision with vector velocities |
| Difficulty | Moderate -0.3 This is a straightforward application of the impulse-momentum theorem with vector addition. Students must apply impulse = change in momentum, add vectors componentwise, then find magnitude using Pythagoras. While it involves vectors, it requires only standard M2 techniques with no problem-solving insight, making it slightly easier than average. |
| Spec | 1.10c Magnitude and direction: of vectors6.03e Impulse: by a force6.03f Impulse-momentum: relation |
\begin{enumerate}
\item The vectors $\mathbf { i }$ and $\mathbf { j }$ are perpendicular unit vectors in a horizontal plane. A ball of mass 0.5 kg is moving with velocity $- 20 \mathbf { i } \mathrm {~m} \mathrm {~s} ^ { - 1 }$ when it is struck by a bat. The bat gives the ball an impulse of $( 15 \mathbf { i } + 10 \mathbf { j } )$ Ns.
\end{enumerate}
Find, to 3 significant figures, the speed of the ball immediately after it has been struck.\\
(5)\\
\hfill \mbox{\textit{Edexcel M2 Q1 [5]}}