Answer:

1.) Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities.

2.) A lever makes work easier by changing the force applied to the machine or the distance over which the force is applied.

3.) The force required to move an object up the incline is less than the weight being raised, discounting friction.

Inclined plane

1.ramps

2.sloping

3.roads

4.hills

5.plows