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प्रश्न
Tick the most appropriate answer.
Which of the following is a Class II lever?
विकल्प
Pliers
A beam balance
A nut-cracker
A knife
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उत्तर
A nut-cracker
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संबंधित प्रश्न
What is a lever?
Describe three orders of levers giving an example of each. Draw neat diagrams showing the positions of fulcrum, load, and effort in each kind of lever.
Give one example of a class I lever in a case where the mechanical advantage is less than 1?
Name the class to which the following lever belong:
a pair of sugar tongs
State three differences between the three classes of levers.
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.
Answer the following in a word or two or in a sentence.
Which type of machine is used to squeeze a lemon?
Both a pair of scissors and a pair of pliers belong to the same class of levers. Name the class of lever. Which one has the mechanical advantage less than 1?
Match the following:
| 1. | Class I lever | a. | Wheelbarrow |
| 2. | Class II lever | b. | Seesaw |
| 3. | Class III lever | c. | Axe |
| 4. | Wedge | d. | Hockey sick |
