Question 4
A child sitting exactly in the middle of a swing weighs 200 N. What is the force in each of the two ropes?
The right answer is the one marked above.
100 N. The two rope forces must add up to the weight, and with the child in the middle the weight divides equally: 200 N ÷ 2 = 100 N.
The trap is answering 200 N by treating one rope as carrying the whole weight. With two ropes it is shared.