An engineer tests four different mechanical prototypes by pulling them across a high-friction testing track. The forces required to pull each prototype and the distances moved are recorded in the table below:
| Prototype | Pulling force needed to move the prototype (N\text{N}N) | Distance moved along the track (m\text{m}m) |
|---|---|---|
| A | 8 | 5 |
| B | 12 | 4 |
| C | 15 | 6 |
| D | 25 | 3 |
On which prototype is the most work done?
Prototype A
Prototype B
Prototype C
Prototype D
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.