The human forearm diagram is given below. It is a lever of
Class III
Class I
Class II
Class I and III both
Effort is in the middle (between L and F) hence class III
The diagram below shows a lever in use. Which class of lever is it?
The figure below shows a lever in use.
(a) To which class of lever does it belong?
(b) If AB = 1m, AF = 0.4 m, find its mechanical advantage.
(c) Calculate the value of E.
A man uses a crowbar of length 1.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand. State the kind of lever and calculate the effort needed.
A man uses a crowbar of length 2.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand. State the kind of lever used and calculate the effort needed.