an adult and a s,all child get on a seesaw that has a movable fulcrum. when the fulcrum is in the middle, the child can't tift the adult. How should the fulcrum be moved so the two can seewaw

I gave you the answer. I assume, now, that you don't have numbers to plug into the equation. But you should figure out from the equation, that qualitatively, the fulcrum must be moved toward the adult.

A__________x_________C
Adult goes down. Child goes up.
So you move the fulcrum closer to the adult.
A______x______________C
Now they can see-saw.

To understand how the adult and the small child can successfully use the seesaw together, we need to explore the concept of torque. Torque is the rotational force that causes an object to rotate around an axis, in this case, the fulcrum of the seesaw.

When the fulcrum is in the middle of the seesaw, the distance from the fulcrum to the adult is greater than the distance from the fulcrum to the child. This difference in distance is essential in determining the balance of the seesaw.

To allow the two to play on the seesaw, the fulcrum needs to be moved closer to the child. By moving the fulcrum closer to the child, you decrease the distance between the fulcrum and the child's end of the seesaw. This reduction in distance compensates for the weight difference between the adult and the child.

Let's break down the steps to achieve balance on the seesaw:

1. Begin with the fulcrum in the center of the seesaw.
2. Ask the adult to sit on one end of the seesaw, extending their legs off the ground.
3. Get the child to sit on the other end of the seesaw, also extending their legs off the ground.
4. If the seesaw is unbalanced, move the fulcrum closer to the child's end. This is done by sliding the fulcrum along the length of the seesaw, usually through slots or holes provided.
5. Keep adjusting the position of the fulcrum until the child is able to lift the adult off the ground and achieve balance.

It's important to note that the seesaw's design should allow for the fulcrum to be moved. Some seesaws have fixed fulcrums and cannot be adjusted. In such cases, it would not be possible for the adult and the small child to use the seesaw together.

Remember, the key to achieving balance is by adjusting the position of the fulcrum, reducing the distance between the fulcrum and the child's end of the seesaw.