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प्रश्न
What is the use of the lever if its mechanical advantage is
- more than 1,
- equal to 1, and
- less than 1?
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उत्तर
- When the mechanical advantage is greater than 1, the lever serves as a force multiplier, enabling us to overcome a sizeable resistive force with a small effort.
- When the mechanical advantage is equal to 1, the lever is applied in a physical balance with equal lengths of both arms.
- When the mechanical advantage is less than 1, the levers are used to obtain the gain in speed. This implies that the load-displacement is greater than the displacement of effort.
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संबंधित प्रश्न
Give one example of a class I lever in a case where the mechanical advantage is less than 1?
Name the machine to which the following belong:
Lemon crusher
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.
Answer the following.
Name the simplest of all types of machines.
Tick the most appropriate answer.
Which of the following is a Class II lever?
Tick the most appropriate answer.
A pair of scissors is an example of a/an
Answer the following in a word or two or in a sentence.
Give one example of a machine used to multiply speed.
Explain why scissors for cutting cloth may have blades longer than the handles, but shears for cutting metals have short blades and long handles.
Classify the following into levers:
A fishing rod
second-order lever ______.
