A rescue worker standing stationary on a frictionless frozen lake throws a 3.2 kg3.2\text{ kg}3.2 kg emergency rescue pack horizontally with a velocity of 7.5 m/s7.5\text{ m/s}7.5 m/s towards a stranded hiker.
State the equation linking momentum, mass, and velocity.
Calculate the momentum of the rescue pack immediately after it is thrown. Include the unit.
When the worker throws the pack forwards, they begin to slide backwards across the ice. Explain why they move in this direction.
The rescue worker wears thick, compressible safety gloves. Explain, in terms of forces and momentum, how these gloves protect their hands if they slip and impact the ice.
56 exam-style questions on Edexcel IGCSE Physics Forces, movement, shape and momentum. Each one has a worked solution and a mark scheme showing where the marks go.