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InterviewSolution
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Hari is studying in 6th standard and is interested in science related experiments. While reading simple machines topic from his text book,he started wondering as to which lever a pen belongs to in its writing position? The length of the pen he is using is 14 cm and he holds it at distance of 4 cm from its nib. If the force applied by Hari to write is 0.02 N, the mechanical advantage of the pen is _____ and it is acting as a _____order lever.A. 5, secondB. 0.25, firstC. 2.5, thirdD. 0.243, third |
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Answer» Correct Answer - D A pen acts as a third order lever in writing position (since the effort is applied at the middle of the fulcrum and the load). The length of pen=load arm=14 cm Effort arm 10=cm Mechanical advantage of pen `=("effort arm")/("loada arm")` `=(10)/(14)=0.243` Hence, the correct option is (d). |
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