As a speedboat approaches a harbour entrance, its velocity falls uniformly from +17 m/s to +7.0 m/s, during which its displacement is +40 m.
Use the equation v2−u2=2axv^2-u^2=2axv2−u2=2ax.
What is the acceleration of the speedboat?
+3.0 m/s2+3.0\ \mathrm{m/s^2}+3.0 m/s2
+6.0 m/s2+6.0\ \mathrm{m/s^2}+6.0 m/s2
−3.0 m/s2-3.0\ \mathrm{m/s^2}−3.0 m/s2
−6.0 m/s2-6.0\ \mathrm{m/s^2}−6.0 m/s2
96 exam-style questions on Edexcel GCSE Physics 2.2 Speed, velocity and acceleration, covering 2.2.1 Speed and distance–time graphs, 2.2.2 Acceleration and the uniform-acceleration equation, 2.2.3 Velocity–time graphs, and 2.2.4 Measuring speed, typical speeds and free-fall acceleration. Each one has a worked solution and a mark scheme showing where the marks go.