Forces

2. When using a lever to raise a load, the lever can _________ the amount of force needed to lift the load.
3. The bouyant force of an object that can float is equal to or greater than the weight of the fluid that the object ___________, or pushes aside.
7. The balance point of a lever.
8. The force of attraction that Earth exerts on objects.
9. A pulley allows you to change the __________ in which you move an object.
10. The force of a magnet is called ____________ force.
13. A wedge, a chisel, and an axe are examples of an inclined　___________．
15. A push or pull that causes changes in motion.
16. To know how an object will move, you just need to know the _____ force.\
17. Forces that act on an object but cancel each other are called ____________ forces.
18. In science, work is using a force to _______ an object through a distance.

1. When ______________ forces act on an object, the object may start, speed up, slow down, stop, or change its direction.
4. The purpose of a simple machine is to make work ________.
5. A wheel with a groove for a rope.
6. A device, made of only a few parts, that makes work easier is a ________ machine.
7. A force that opposes motion.
11. Most machines allow you to use less force, but you apply it over a ___________ distance. The product of force and distance remains the same.
12. A ramp or sloping surface is an __________ plane.
14. A bar that makes it easier to move things.