8. A lever of length 9 cm has its load arm 5 cm long
and the effort arm is 9 cm long. (a) To which class
does it belong ? (b) Draw a diagram of the lever showing
the position of the fulcrum F and directions of both
the load L and effort E. (c) What is the mechanical
advantage and velocity ratio if the efficiency is 100%?
(d) What will be the mechanical advantage and velocity
ratio if the efficiency becomes 50% ?
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Answer:
add point 5 to 15, 16, 17 etc
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