An electric motor powered by a battery is used to lift a heavy load.
Identify the names of the following energy stores in this system:
(i) The type of energy store in the battery that decreases as it powers the motor.
(ii) The type of energy store in the load that has increased after the load is lifted and comes to rest at a height.
The weight of the load is 12.0 N12.0\text{ N}12.0 N. The motor lifts the load through a vertical distance of 0.80 m0.80\text{ m}0.80 m.
Calculate the work done on the load.
During the lifting process, the electrical current in the motor is 0.50 A0.50\text{ A}0.50 A and the potential difference across it is 9.0 V9.0\text{ V}9.0 V.
Calculate the electrical power input to the motor.
533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.