Centripetal forceEdexcel A-Level Physics: Mind map

Exam questions on Centripetal force

1. A puck of mass 0.25 kg is attached to a light string, the other end of which is fixed to a smooth horizontal table. The puck moves in a horizontal circle of radius 0.80 m at a constant speed of 4.0 m s⁻¹.
   Calculate the tension in the string.2 marks
2. A car of mass 1200 kg travels at a constant speed of 14 m s⁻¹ round a flat, circular roundabout of radius 25 m. The maximum sideways frictional force that the tyres can exert on the road surface is 8.0 kN.
   Deduce whether the car can travel round the roundabout at 14 m s⁻¹ without skidding.2 marks
3. A fairground 'rotor' ride is a vertical cylinder of radius 2.5 m that rotates about its vertical axis at a constant angular speed of 3.0 rad s⁻¹. A rider of mass 60 kg stands against the inside wall of the cylinder. Once the cylinder is rotating at full speed the floor is lowered, and the rider stays in contact with the wall without sliding down.
   Calculate the speed of the rider and the resultant force on the rider.3 marks