An autonomous delivery drone is being tested as it docks into an elastic catching-mesh on a landing platform.
During the docking process, the drone and the catching-mesh can be modeled as a closed system. What is meant by a 'closed system'?
How does Newton’s Third Law of motion apply to the collision between the drone and the catching-mesh?
During the impact, the change in momentum of the drone is 72 kg m/s72\text{ kg m/s}72 kg m/s. The time taken for the collision is 0.24 s0.24\text{ s}0.24 s. Calculate the average force exerted on the drone during this time.
The catching-mesh is highly flexible. Explain how this mesh reduces the risk of structural damage to the drone compared to a rigid landing wall.
Before engaging the catching-mesh, the drone flew with an initial constant velocity and then accelerated at 1.6 m/s21.6\text{ m/s}^21.6 m/s2 to prepare for landing. While accelerating, the drone travelled a distance of 2.5 m2.5\text{ m}2.5 m. The final velocity of the drone just before impact was 4.5 m/s4.5\text{ m/s}4.5 m/s. Calculate the initial constant velocity of the drone.
6 exam-style questions on AQA GCSE Physics 5.7 Momentum (HT only), covering 5.7.1 Momentum is a property of moving objects, 5.7.2 Conservation of momentum, and 5.7.3 Changes in momentum. Each one has a worked solution and a mark scheme showing where the marks go.