Physics
The diagram given below shows the three kinds of levers. Name the class of each lever and give one example of each class.
(a)
(b)
(c)
Machines
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Answer
Three kinds of friction are as follow :
(a) Class II lever
Example: Wheel barrow
(b) Class I lever
Example: Pair of scissors
(c) Class III lever
Example: Knife
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Related Questions
Give one example of class I lever in each case where the mechanical advantage is
(i) more than 1
(ii) equal to 1
(iii) less than 1.
Name the class to which the following levers belong :
(a) A pair of scissors,
(b) a lemon squeezer,
(c) a nut cracker,
(d) a pair of sugar tongs,
(e) a beam balance,
(f) an oar rowing a boat,
(g) a wheel barrow,
(h) a see-saw,
(i) a pair of pliers,
(j) a crowbar.
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How does the friction at the fulcrum affect the mechanical advantage of a lever ?