Advertisements
Advertisements
प्रश्न
The lever for which the mechanical advantage is less than 1 has :
विकल्प
Fulcrum at mid-point between load and effort.
Load between effort and fulcrum.
Effort between fulcrum and load.
Load and effort acting at the same point.
Advertisements
उत्तर
Effort between fulcrum and load.
Reason:
Levers, for which the mechanical advantage is less than 1, always have the effort arm shorter than the load arm.
APPEARS IN
संबंधित प्रश्न
Which class of lever will always have MA > 1 and why?
A 4 m long rod of negligible weight is to be balanced about a point 125 cm from one end and a load of 18 kgf is suspended at a point 60 cm from the support on the shorter arm.
- If a weight W is placed at a distance of 250 cm from the support on the longer arm to balance the rod, find W.
- If a weight 5 kgf is kept to balance the rod, find its position.
- To which class of lever does it belong?
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?
Pliers Tools
The following belong to which class of lever?
Sugar tongs
The following belong to which class of lever?
Knife
The following are an example of levers. State the class of lever to which each one belongs giving the relative positions of Load (L), Effort (E), Fulcrum (F):
(i) Scissors (ii) Sugar tongs (iii) Nutcracker (iv) Pliers.
Draw a labelled sketch of a second class lever. Give one example of such a lever.
The length of a nut-cracker is 12 cm. A nut, when kept at a distance of 4 cm from its fulcrum, requires an effort of 100 gf to crack it. What force will be required to crack the nut without using the nut-cracker?
A lever is used to multiply the force.
