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प्रश्न
Which class of lever found in the human body is being used by a boy when he holds a load on the palm of his hand.
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उत्तर
Class III lever.
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संबंधित प्रश्न
Write down a relation expressing the mechanical advantage of a lever.
A man uses a crowbar of length 1.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand.
- Draw a diagram of the arrangement showing the fulcrum (F), load (L) and effort (E) with their directions.
- State the kind of lever.
- Calculate:
- load arm,
- effort arm,
- mechanical advantage and
- the effort needed.
The following belong to which class of lever?
A claw-hammer
The following belong to which class of lever?
A pair of scissors
The following belong to which class of lever?
Wheelbarrow
The following belong to which class of lever?
Nutcracker
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?
In the diagram shown alongside a claw hammer, mark the fulcrum (F) and indicate the directions of load (L) and effort (E) with arrows. What class of lever is it? Give one more example of this class of lever.
What is a lever?
What is a first-order lever?
