A child climbs a staircase four times. The duration of each climb is measured. For which time is the child’s useful power the largest?
- A$10\,\text{s}$
- B$20\,\text{s}$
- C$30\,\text{s}$
- D$40\,\text{s}$
Physics 0625 · IGCSE · Energy, work and power
Physics 0625 · IGCSE · Energy, work and power
A child climbs a staircase four times. The duration of each climb is measured. For which time is the child’s useful power the largest?