Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
FORCE, MASS AND ACCELERATION
18 practice questions
Practice questions
1–2 of 2 · Hard
Question 1
4 marks · Hard
Answer and see the solution →A football goalkeeper of mass 80 kg dives to stop a ball and comes to a stop in 0.15 s after making contact with the ground. Just before contact, the goalkeeper's horizontal speed is 5.2 m/s.
(a)[2 marks]Calculate the horizontal acceleration of the goalkeeper as he comes to rest.
(b)[2 marks]Calculate the magnitude of the unbalanced force acting on the goalkeeper during this time.
Question 2
3 marks · Hard
Answer and see the solution →A company wants to design an emergency stopping system for lightweight drones. The system applies the same unbalanced force to drones of different masses to bring them to a stop in emergencies.
Explain, using the formula , why lighter drones can be stopped more quickly than heavier drones by the same force. In your answer, refer to how acceleration depends on mass.