2 Written questions
2 Multiple choice questions
- A wheel and axle with a rope or chain attached to it. it changes the direction of motion with gravity.
- this machine rolls. wheels help you move an object across the ground of friction between what you are trying to move and the surface you are pulling it against.
2 True/False questions
Screw → this machine is like a ramp- and the thread is like the angle of an inclined plane. the wider the thread the harder it is to turn.
Wedge → a stick free to pivot back and forward to a certin point.the point on this machine is called the fulcrum.