Question

What is the advantage of using a lever?
A) To do work
B) To provide energy to do work
C) To produce power
D) Work can be done using much less force than would otherwise be necessary

Answer 1

Hint: First of all, get to know about what is lever and find out by thinking for which purpose it can be used. So, as you get an idea, you can select the correct option which is an advantage of lever from the above options given.

Complete step by step solution:
Liver can be defined as a rigid body capable of rotating on a point on itself. There are many advantages to using the liver.
Because by using a lever, we can do the work in an easy and desired way. A lever can amplify an input force so that it can provide a greater output force, which is said to be as leverage. The effort which is required to move any load mainly depends on the relative distance of each from the fulcrum. The ratio of load and the input force or effort that is applied is called a mechanical advantage. The remaining options are wrong because the lever is not used to do work or does not provide energy to do work. It does not produce power also.

Thus, the correct option is option “D”.

Note: Lever concept is applied in many actions in our daily life such as scissors, pliers, bottle openers, shovels, brooms etc. The principle behind the working of a lever is equilibrium state is established because two equal forces acting in opposite directions, clockwise and anticlockwise, that are applied to a uniform lever at equal distances.