Advertisements
Advertisements
प्रश्न
Which class of lever will always have MA > 1 and why?
Advertisements
उत्तर
A Class II lever will always have MA > 1. This is because the load is between the fulcrum and the effort. So, the effort arm is always greater than the load arm. Hence, MA = E/L > 1.
APPEARS IN
संबंधित प्रश्न
Name a machine to obtain gain in speed ?
Give one example of a class I lever where mechanical advantage is more than one ?
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.
- Draw a diagram of the arrangement showing the fulcrum (F), load (L) and effort (E) with their directions.
- State the kind of lever.
- Calculate:
- load arm,
- effort arm,
- mechanical advantage and
- the effort needed.
Give three examples for leavers of the third order.
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?
An oar of a boat
When we want to use a machine as a force multiplier, which class of lever should we preferably use? Give a simple diagram of such a lever.
The diagram below shows a lever in use.
(i) To which class of lever does it belong?
(ii) If FA = 40 cm, AB = 60 cm, then find the mechanical advantage of the lever.
What is a lever?
