Three children are playing on a seesaw. The largest child has a mass of 50 kg and sits on the right side of the seesaw 0.9 m from the fulcrum. The middle child has a mass of 40 kg and sits on the left side of the seesaw 2.5 m from the fulcrum. Where does the smallest child, who has a mass of 25 kg, need to sit in order to balance the seesaw?

Two children are trying to balance on a seesaw, which includes a fulcrum and a board that is 10m long.  Boy A has a mass of 50kg, and boy B has a mass of 35kg.  How far from the pivot point should boy B be to maintain stable equilibrium?

A 5.2-m ladder rests against a wall as shown. The ladder has a mass of 27.6 kg. A 56.3-kg person stands on the ladder at a distance of 3.6 m from the bottom of the ladder. The foot of the ladder is 1.9 m from the bottom of the wall. Assume there is no friction between the ladder and the wall so that the force of the wall on the ladder is acting only in the horizontal direction. However, there is a friction force between the ladder and the ground. 1.) What is the force, in N, exerted by the wall on the ladder?

What is the student’s weight?

B4

To get up on the roof, a person (mass 87.0 kg) places a 5.60 m aluminum ladder (mass 14.0 kg) against the house on a concrete pad with the base of the ladder 2.00 m from the house. The ladder rests against a plastic rain gutter, which we can assume to be frictionless. The center of mass of the ladder is 2 m from the bottom. The person is standing 3 m from the bottom. What are the magnitudes (in N) of the forces on the ladder at the top and bottom? top N bottom N

A 50 N weight is located 20 cm from the fulcrum of a balance beam. At what distance from the fulcrum should a 20 N weight be placed to balance the system?

Jack and Jill want to balance their seesaw. Where should they set the fulcrum? Jack has a mass of 25 kg, Jill has a mass of 15 kg, and the seesaw board has a mass of 20.0 kg.

Bob and Anna sit on opposite ends of a uniform see-saw which is 12.0 m in length. The see-saw is balanced by a fulcrum which is located 4.00 m from Bob. Bob has a mass of 85.0 kg, and the see-saw itself has a mass of 100 kg. Anna’s mass is unknown. NOTE THAT THE FULCRUM IS NOT PLACED AT THE CENTER OF MASS OF THE SEE- SAW!!! a)   What is the net torque on the see-saw? Explain clearly and briefly how you know. b) Draw a properly labeled extended force diagram of the see-saw   c) Solve for Anna’s mass. Show your work clearly!

Three children are trying to balance on a seesaw.  The seesaw is 4.1 m long and pivots about a rock at its center.  Louie and Laura are already sitting on opposite ends.  If Martha weighs 33 kg, where should she sit so as to balance the seesaw?