Question

2. Does a simple machine serve every purpose? Explain with an example​

Answer 1

Answer:

The basic purpose for which most simple machines are designed is to reduce the effort (force) required to perform a simple task.

Screws, levers and inclined planes are designed to increase the distance over which the reduced force acts so that we can push or pull with less effort.

Explanation:

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Answer 2

We all do work in our daily lives and we all use simple machines every day. Work as defined by science is force acting upon an object in order to move it across a distance. So scientifically, whenever we push, pull, or cause something to move by using a force, we are performing work. A machine is basically a tool used to make this work easier, and a simple machine is among the simplest tools we can use. Therefore, from a scientific standpoint, we are doing work when we open a can of paint with a screwdriver, use a spade to pull out weeds, slide boxes down a ramp, or go up and down on a see-saw. In each of these examples we are using a simple machine that allows us to achieve our goal with less muscle effort or in a shorter amount of time.