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प्रश्न
Answer the following in a word or two or in a sentence.
Give one example of a machine used to multiply speed.
उत्तर
Class III lever (hockey stick, fbreep)
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संबंधित प्रश्न
What do you mean by the mechanical advantage of a lever?
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?
Give one example of a class I lever where mechanical advantage is less than 1.
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?
Explain why scissors for cutting cloth may have blades longer than the handles, but shears for cutting metals have short blades and long handles.
Explain why the mechanical advantage of a class II of lever is always more than 1.
Classify the following into levers:
A door
The diagram below shows a rod lifting a stone.
- Mark position of fulcrum F and draw arrows to show the directions of load L and effort E.
- What class of lever is the rod?
- Give one more example of the same class of lever stated in part (b).
Name the class of the lever shown in the picture below:
