Solved Q1 to 20 9702/12/F/M/18 AS physics

A girl throws a ball vertically upwards. It takes a time of 3.20 s to return to her hand. Steel pellets, each with a mass of 0.60 g, fall vertically onto a horizontal plate at a rate of 100 pellets per minute. A car of mass 1100 kg is travelling at a constant speed of 15 .........A small diesel engine uses a volume of 1.5 × 104cm3 of fuel per hour to produce a useful power output of 40 kW. It may be assumed that 34 kJ of energy ...The diagram shows a large crane on a construction site lifting a cube-shaped load at a constant speed. A model is made of the crane, its load and the cable supporting the load. The material used for each part of the model is the same as that in the full-size crane, cable and load. The model is one tenth full-size in all linear dimensions.