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 diagram of the lever showing the position of 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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Q. A lever of length 14 cm has its load arm 5 cm long and effort arm is 9 cm long. (a) To which class does it belong? (b) Draw diagram of the lever showing the position of fulcrum F and directions of both the load L and effort E. (c) What is the mechanical advantage and velocity ration if the efficiency is 100% ? (d) What will be the mechanical advantage and velocity ration if the efficiency becomes 50%?

Q. A lever of length

9 cm

has its load arm

5 cm

long and the effort arm

9 cm

long:
(a) Which class does the lever belong to?
(b) What will be the mechanical advantage and velocity ratio if the efficiency becomes

50 %

A crowbar of length 120 cm has its fulcrum situated at a distance of 20 cm from the load. Calculate the effort arm and the mechanical advantage of the crowbar.

Calculate the mechanical advantage of a lever when load arm = $15 c m$ and effort arm = $30 c m$ .

Calculate the mechanical advantage of a lever when the effort arm = $12 c m$ and the load arm = $30 c m$ .

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Class 2 Lever

Standard X Physics

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