Which simple machine is formed by an inclined plane wrapped around a cylindrical post?

Which simple machine is formed by an inclined plane wrapped around a cylindrical post?

• A. Inclined Plane
• B. Wedge
• C. Screw
• D. Pulley

Answer: (C)

A screw is formed by an inclined plane wrapped around a cylindrical post. When you twist the screw, that inclined plane becomes a helical thread around the cylinder, turning rotational motion into linear motion as the screw advances with each turn. This threading also enables the screw to clamp materials together, since the threads bite into the surface and resist forces trying to pull it out. The other options describe different devices: an inclined plane is just a flat ramp, a wedge is two inclined planes meeting to split or cut, and a pulley uses a wheel and rope to change the direction of a force rather than create helical motion around a cylinder.

A screw is formed by an inclined plane wrapped around a cylindrical post. When you twist the screw, that inclined plane becomes a helical thread around the cylinder, turning rotational motion into linear motion as the screw advances with each turn. This threading also enables the screw to clamp materials together, since the threads bite into the surface and resist forces trying to pull it out. The other options describe different devices: an inclined plane is just a flat ramp, a wedge is two inclined planes meeting to split or cut, and a pulley uses a wheel and rope to change the direction of a force rather than create helical motion around a cylinder.