Simple Machines: Basic Mechanical Devices

What is a device that does work with only one movement and changes the size or direction of a force?

a) Compound machine

b) Effort machine

c) Screw

d) Simple machine

Answer:

A device that does work with only one movement and changes the size or direction of a force is a simple machine.

For applying force, any used basic mechanical devices are simple machines. Simple machine changes the direction as well as the amplitude of the applied force i.e. we can increase or decrease the magnitude of the force. A simple machine is the most basic mechanism to use the force as we need in big mechanical machines. Some of the examples of simple machines are inclined plane, lever, wedge, wheel and axle, pulley, and screw.

The answer is simple machines I took the test, it is 100% correct.