A jet-powered test vehicle has a mass of 1600 kg1600\text{ kg}1600 kg. It accelerates uniformly from rest on a straight horizontal track to a maximum speed of 120 m/s120\text{ m/s}120 m/s at a time of 8.0 s8.0\text{ s}8.0 s. The engine is then switched off and a parachute is deployed. The vehicle then decelerates until it stops. This entire motion is represented on a speed–time graph, where the acceleration phase is a straight line and the deceleration phase is a downward curve that gradually flattens out.
Calculate the maximum momentum of the vehicle during the run.
State the feature of the speed–time graph that represents the distance travelled by the vehicle.
Determine the distance travelled by the vehicle in the first 8.0 s8.0\text{ s}8.0 s.
The parachute opens at 8.0 s8.0\text{ s}8.0 s and the vehicle decelerates. Describe how the speed–time graph shows that, after 8.0 s8.0\text{ s}8.0 s:
(i) the vehicle decelerates,
The parachute opens at 8.0 s8.0\text{ s}8.0 s and the vehicle decelerates. Describe how the speed–time graph shows that, after 8.0 s8.0\text{ s}8.0 s:
(ii) the deceleration of the vehicle is not constant.
Describe the energy transfer that takes place as the vehicle slows down.
204 exam-style questions on CIE IGCSE Physics Motion, covering Motion. Each one has a worked solution and a mark scheme showing where the marks go.