Question

a machine is a device that can make work easier
there are 6 simple machines.
a lever is a bar that pivots around a fulcrum (the pivot point).
an inclined plane is a flat surface that slopes.
a wheel and axle is a wheel attached to a smaller axle. these two parts rotate together to create a simple machine.
a wedge is two inclined planes back to back.
a pulley is a grooved wheel with a cable wrapped around it
a screw is an inclined plane wrapped around a post.
a compound machine is a device made up of two or more simple machines.
choose the correct answer.
what is a screw?
a grooved wheel with a cable wrapped around it
two inclined planes back to back
an inclined plane wrapped around a post

Explanation:

To determine the correct definition of a screw, we refer to the left - hand text which states "A screw is an inclined plane wrapped around a post". Now let's analyze the options:

• The option "A grooved wheel with a cable wrapped around it" is the definition of a pulley, not a screw.
• The option "Two inclined planes back to back" is the definition of a wedge, not a screw.
• The option "An inclined plane wrapped around a post" matches the given definition of a screw.

Answer:

An inclined plane wrapped around a post