A motorized conveyor belt in a logistics center is used to lift packages of identical mass from the ground floor to a loading platform at a fixed height.
To speed up operations, the supervisor increases the speed of the conveyor belt motor so that a greater number of packages are lifted to the platform in a given time.
How does this adjustment affect the work done in lifting each individual package and the useful power output of the motor?
Work done per package increases; useful power output decreases.
Work done per package increases; useful power output increases.
Work done per package remains unchanged; useful power output decreases.
Work done per package remains unchanged; useful power output increases.
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.