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प्रश्न
What is a lever?
उत्तर
A lever is a simple rigid bar that is free to move around a point called the fulcrum.
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संबंधित प्रश्न
What do you mean by the mechanical advantage of a lever?
Give one example of a class I lever in a case where the mechanical advantage is less than 1?
The diagram given below shows the three kinds of levers. Name the class of lever and give one example of the class.
Draw diagram to illustrate the position of fulcrum, load, and effort, of the following:
a pair of forceps
In a lever, the fulcrum is at one end at a distance of 30 cm from the load and effort is at the other end at a distance of 90 cm from the load. Find :
(a) the length of load arm,
(b) the length of effort arm, and
(c) the mechanical advantage of the lever.
Tick the most appropriate answer.
Which of the following is a Class II lever?
Answer the following in short.
What is the basis of the classification of levers?
Answer the following in short.
Using a suitable example, describe how a machine acts as a force multiplier.
Explain why scissors for cutting cloth may have blades longer than the handles, but shears for cutting metals have short blades and long handles.
Differentiate Class I lever and Class II lever.
