The diagram below shows a pulley system, a mass of 10kg is raised 2m by an effort of 80N.
![Physcf4et1p1q17b](https://www.easyelimu.com/images/form_4_past_papers/Form4_EndTerm1_2021/Physc_Paper_1_2_3/Physcf4et1p1q17b.JPG)
- Calculate the distance moved by effort.
- How much potential energy does the load gain?
- How much work is done by the effort?
- What is the efficiency of these pulleys?
- Explain why it easier to tighten or loosen a nut using a spanner with a long handle than one with a short handle.