A stage platform of mass 400 kg is initially stationary. Its weight is 4000 N and the tension in its vertical cable is initially 4000 N. The tension is increased to 4200 N for 2.0 s. The tension is then reduced to 4000 N while the platform is moving. Ignore all other forces.
Calculate the speed of the platform just before the tension is reduced.
Explain how the platform moves after the tension is reduced.
103 exam-style questions on Edexcel GCSE Physics 2.3 Forces and Newton's laws, covering 2.3.1 Newton's first law, 2.3.2 Newton's second law, and 2.3.3 Weight and gravitational field strength. Each one has a worked solution and a mark scheme showing where the marks go.