Help for Physics Qs...

ABCE

Anyone know solutions to these Qs in relation to Moments?

1) A uniform mast 10m long and of mass 100kg is being carried horizontally by a man and a boy. If the man is 3m from one end of the mast and the boy is at the far end, find the upward force exerted by the boy and the man on the mast. Where should the man support the mast if he is to carry three times the weight of the boy, the boy remaining at one end?

If got the first part of that. Man exerts 700N and boy exerts 280N. I don't how to go about doing the second part of it..

2) A man and a boy hold opposite ends of a pole 8m long which is horizontal. A mass of 200kg is tied to the pole. If the man is to support 4 times as much weight as the boy, where along the pole must the weight be tied? (Neglecting weight of pole).

Any help would be appreciated!!

Mahmoudsaid_1

Theres a very similar example in the book before the moments exercise