Standard +0.3 This is a straightforward multi-step mechanics problem requiring impulse-momentum theorem to find final velocity, then calculating kinetic energies before and after. The vector arithmetic is simple and the method is standard textbook procedure, making it slightly easier than average but requiring careful calculation across multiple steps for 6 marks.
A particle of mass 0.3 kg is moving with velocity \((5\mathbf{i} + 3\mathbf{j})\) m s\(^{-1}\) when it receives an impulse \((-3\mathbf{i} + 3\mathbf{j})\) N s. Find the change in the kinetic energy of the particle due to the impulse.
[6]
A particle of mass 0.3 kg is moving with velocity $(5\mathbf{i} + 3\mathbf{j})$ m s$^{-1}$ when it receives an impulse $(-3\mathbf{i} + 3\mathbf{j})$ N s. Find the change in the kinetic energy of the particle due to the impulse.
[6]
\hfill \mbox{\textit{Edexcel M2 2015 Q1 [6]}}