CSEC Physics · January 2017 · Paper 2 · Question 3(b)(i)

Figure 2 shows Kyle and Keion balanced on a seesaw. Kyle's weight is 500 N and Keion's weight is 300 N. The seesaw is made of a uniform plank of weight 800 N which is 4 m long, pivoted at its centre.

By taking moments about the pivot, calculate the distance, x, that Keion must sit from the pivot to balance the plank if Kyle sits 1 m from one end of the plank.

This question uses a figure or table from the paper — you'll see it when you practise.