Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
(a) W × CE = 18 × DC
W × 250 = 18 × 60
∴ W = `(18 xx 60)/250`
∴ W = 4.32 kgf
(b) New W = 5 kgf
Let it be placed at a distance x from C on arm CB
∴ 5 × x = 18 × 60
∴ x = `(18 xx 60)/5`
= 216 cm
(c) It belongs to class I lever.
APPEARS IN
संबंधित प्रश्न
State the principle of a lever?
Give one example of a class I lever where mechanical advantage is more than one ?
shows a nut cracker name the class of lever ?
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.
Define Lever
The following belong to which class of lever?
A pair of scissors
The following belong to which class of lever?
Nutcracker
The following belong to which class of lever?
Fore-arm
State the types (or kinds) of lever, and give two examples of each kind.
A lever is used to multiply the force.
