Give Three Examples for Leavers of 1st Order.

Give three examples for leavers of 1st order.

One Line Answer

Levers of 1st order:
(i) Railway signal
(ii) Handle of water pump
(iii) Motor car foot brake
(iv) Nail cutter

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What is a lever?

State the principle of a lever?

Write down a relation expressing the mechanical advantage of a lever.

Fig 3.17 below shows a lever in use.

(a) To which class of lever does it belong?
(b) If FA = 80 cm, AB = 20 cm, find its mechanical advantage.
(c) Calculate the value of E.

Which class of lever found in the human body is being used by a boy when he holds a load on the palm of his hand.