Calculus

The seesaw principle: As you probably know, any two persons can balance each other
when sitting on opposite sides of a seesaw, regardless of their weights. It is only necessary
that each person contribute the same moment â€” calculated by multiplying the personâ€™s
weight times the distance to the fulcrum. For example, if an 80-
pound child sits at one end of a 20-foot plank, 10 feet from the
fulcrum, a 200-pound adult can balance this system. Tell how.

1. 200 x = 10 * 80
x = 4

posted by Damon

Similar Questions

1. Physics

Three children are trying to balance on a seesaw. The seesaw is 3.9 m long and pivots about a rock at its center. Louie and Laura are already sitting on opposite ends. If Martha weighs 27 kg, where should she sit so as to balance
2. Algebra

Two children balance on opposite ends of a seesaw. One child weighs 45 pounds and the other weighs 38 pounds. The distance between them is 10 feet. What is the distance of each child from the fulcrum (the center balance point of
3. math

A 65-kg boy is sitting on a seesaw 0.6 m from the balance point. How far from the balance point should a 40-kg girl sit so that the seesaw remains balance?
4. Vectors

A 65-kg boy is sitting on a seesaw 0.6 m from the balance point. How far from the balance point should a 40-kg girl sit so that the seesaw remains balance?
5. Physics

A father and son sitting on opposite sides of a seesaw balance each other. What is the father's weight if he is seated at 0.5m away from fulcrum and son is seated at 1.5m away from the fulcrum and weighs 200N?
6. science

A 10 meter long seesaw has a boy of mass 20 kg sitting on one end . How far away from him should a girl of mass 30kg sit to balance the seesaw?
7. physics

Mary and John are on opposite sides of a seesaw. Mary has 3x the mass of John. If Mary is sitting at a distance of .5m from the fulcrum, how far must John site in order to keep it balanced.
8. algebra

To balance a seesaw, the distance, in feet, a person is from the fulcrum is inversely proportional to the person's weight, in pounds. Peter, who weighs 150 pounds, is sitting 3 feet away from the fulcrum. If Joey weighs 90 pounds,
9. Math

Suppose a child is sitting 5 feet from the fulcrum. Where does a 175 pound adult need to sit for the seesaw to be balance?
10. physics

when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter

More Similar Questions