D. Tell whether the following statements about simple machines are true or false.
16. An inclined plane is a slanting or sloping surface that connects a lower level to a higher
level.
17. A screw is composed of a cylindrical body with a spiral ridge called pitch.
18. The three kinds of pulley include fixed pulley, movable pulley, and compound pulley.
19. A wedge is an inclined plane or two inclined planes that meet each other to form a sharp
edge.
20. In a wheel and axle, it is only the wheel that turns whereas the axle remains steady.​