Figure 11 shows a pulley system that enables a person to lift a heavy barrel - Edexcel - GCSE Physics Combined Science - Question 6 - 2023 - Paper 2

To find the weight of the barrel, we can rearrange the formula for work done:

$$ext{work done} = ext{force} imes ext{distance moved}$$

Inserting the known values:

$$1800 = ext{force} imes 1.2$$

Now, to isolate the force (weight of the barrel), we divide both sides by 1.2:

ext{force} = rac{1800}{1.2} = 1500 ext{ N}

Therefore, the weight of the barrel is 1500 N.