An aircraft touches down on a straight runway. It slows with uniform acceleration.
| time after touchdown in s\mathrm{s}s | velocity in m/s\mathrm{m/s}m/s |
|---|---|
| 0.0 | 68 |
| 8.0 | 44 |
The aircraft continues to slow with the same acceleration until its velocity is 20 m/s.
Use the equation
v2−u2=2ax v^2-u^2=2ax v2−u2=2axCalculate the distance travelled by the aircraft from touchdown until its velocity reaches 20 m/s.
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.