Question

Select the choice that best completes the following sentence. Simple machines A. reduce the amount of energy needed to do work. B. are made up of multiple moving parts. C. are tools that make work easier. D. cannot be combined to make compound machines.

Answer 1

It is actually are tools that make work easier C because i just had it on study island

Answer 2

Answer:

C. are tools that make work easier.

Explanation:Simple machines are tools that make work easier by changing the direction of the applied force or by reducing the amount of input force needed.

Simple machines do not change the amount of energy needed to perform a certain task. For example, when an object is raised, this work can be made easier using a ramp (inclined plane). A ramp reduces the force needed to lift the object, but increases the distance over which the force is applied. So the amount of work, or energy, remains constant.

Simple machines are not made up of multiple moving parts, but they may be combined together to make compound machines.