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प्रश्न
Draw a labelled sketch of a second class lever. Give one example of such a lever.
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उत्तर
A labelled diagram of a second class lever is given below. Its example is a nut-cracker.
Second Class Lever
Example of a second class lever (Nut-cracker)
संबंधित प्रश्न
Give one example of a class I lever where mechanical advantage is more than one ?
A 4 m long rod of negligible weight is to be balanced about a point 125 cm from one end and a load of 18 kgf is suspended at a point 60 cm from the support on the shorter arm.
- If a weight W is placed at a distance of 250 cm from the support on the longer arm to balance the rod, find W.
- If a weight 5 kgf is kept to balance the rod, find its position.
- To which class of lever does it belong?
A lever of length 9 cm has its load arm 5 cm long and the effort arm is 9 cm long.
- To which class does it belong?
- Draw a diagram of the lever showing the position of fulcrum F and directions of both the load L and effort E.
- What is the mechanical advantage and velocity ratio if the efficiency is 100%?
- What will be the mechanical advantage and velocity ratio if the efficiency becomes 50%?
Give three examples for leavers of the third order.
The following belong to which class of lever?
A see-saw
The following belong to which class of lever?
A claw-hammer
The following belong to which class of lever?
A fire tongs
The following belong to which class of lever?
A pair of scissors
What is a lever?
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?
