Question

B. Name the following:
1.a rigid bar which can rotate freely about a fixed
point or a fixed line.
2.the ratio of load to effort of a machine.
3.the work done on a machine.
4. the fixed point about which a lever can turn.
5. any plane surface that is tilted or inclined to the horizontal.​

Answer 1

Answer:

1) Lever

2) Mechanical advantage

4) Fulcrum

This is all what I know

Hope it helps you!

Answer 2

Answer:

1.Lever

2.Mechanical advantage