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11th biology question
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100% as output energy is always less than the input
energy because some energy is lost to overcome
friction.
Q.8-What is a lever?
A.8- A lever is a simple rigid bar that is free to move
around a point is called the fulcrum.
Q.9- What do you mean by the mechanical
advantages of a lever?
A.9-The mechanical advantage of a lever is equal to
the ratio of the effort arm to the load arm. This is
also called the principle of a lever.
Q.10- What are the three classes of lever?
A.10- Levers are divided into three classes-
-Levers of Class I
The levers in which the fulcrum is between the
load and the effort are called levers of class I.
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Naanum 11 th tha
But Tamil medium illa pa , sry if it is in Eng , I will try
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