Advertisements
Advertisements
рдкреНрд░рд╢реНрди
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.
Advertisements
рдЙрддреНрддрд░
(a) This is a class II lever.
(b) Given: FA=80 cm, AB = 20 cm, BF= FA+AB=100cm
Mechanical advantage M.A = `"ЁЭР╡ЁЭР╣"/"ЁЭР┤ЁЭР╣"`= `100/80` = 1.25
(c) Effort (E) = `"ЁЭР┐ЁЭСЬЁЭСОЁЭСС (ЁЭР┐)"/"ЁЭСА.ЁЭР┤"` = `5 /1.25` = 4 ЁЭР╛ЁЭСФЁЭСУ
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНтАНрди
Which class of lever will always have MA > 1 and why?
The diagram below shows a lever in use:
- To which class of levers does it belong?
- Without changing the dimensions of the lever, if the load is shifted towards the fulcrum what happens to the mechanical advantage of the lever?
shows a nut cracker name the class of lever ?
The lever for which the mechanical advantage is less than 1 has :
Define Lever
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.
The following belong to which class of lever?
The Physical balance
The following belong to which class of lever?
A pair of scissors
In the diagram shown alongside a claw hammer, mark the fulcrum (F) and indicate the directions of load (L) and effort (E) with arrows. What class of lever is it? Give one more example of this class of lever.
What is a lever?
