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Question
What is a lever?
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Solution
A lever is a rigid rod that may be bent or straight and rotates around a point; it is known as a FULCRUM.
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RELATED QUESTIONS
Write down a relation expressing the mechanical advantage of a lever.
The lever for which the mechanical advantage is less than 1 has :
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Shears, used for cutting metals and scissors used for cutting clothes are both examples of levers of the first order. However, whereas the shears always have short blades and long handles, the scissors often have blades much longer than the handles. Explain, why this is so?
The length of a nut-cracker is 12 cm. A nut, when kept at a distance of 4 cm from its fulcrum, requires an effort of 100 gf to crack it. What force will be required to crack the nut without using the nut-cracker?
A lever is used to multiply the force.
