True or False
6. To reduce the amount of force required to move an object,an inclined plane is used.
7. A screw has a circular disk or frame turning on a central axis.
8. In all levers, the fulcrum is placed only in one location along the bar.
9. Wedges are used to cut or split objects apart.
10. The simple machines are lever,screw,pulley, and wedges only.
11. Ramps and stairs are example of levers.
12. Pulleys work with gravity in making work easier and more efficient.
13. A nutcracker is an example of a third-class lever.
14. A scissor can be both a wedge and a lever.
15. Block-and-tackle pulleys are mostly used to move and transport cargo in port areas.