My textbook has got the weirdest questions I've ever seen. I wonder why can't A lvl questions be that interesting.

Romeo (77.0kg) entertains Juliet (55.0kg) by playing his guitar from the rear of their boat at rest in still water, 2.70m in front of Juliet, who is sitting at the front of the boat. After the serenade, Juliet carefully moves towards the rear of the boat (away from the shore) to plant a kiss on Romeo's cheek. How far does the 80.0kg boat move toward the shore it is facing.

Next, we have one about Tarzan and Jane.

And last but not least, we've got one about Superman too.