Advertisements
Advertisements
प्रश्न
In a lever, the fulcrum is at one end at a distance of 30 cm from the load and effort is at the other end at a distance of 90 cm from the load. Find :
(a) the length of load arm,
(b) the length of effort arm, and
(c) the mechanical advantage of the lever.
Advertisements
उत्तर
Given,
(a) Load arm = 30 cm
(b) Effort arm = (90 + 30) cm = 120 cm
(c) Mechanical advantage = `"Effort arm"/"Load arm"`
= `"120 cm"/"30 cm"`
= 4
APPEARS IN
संबंधित प्रश्न
What is a lever?
Which class of lever has the mechanical advantage always more than 1? Give an example.
Give one example of a class I lever where the mechanical advantage is more than 1.
Name the class to which the following lever belong:
a see-saw
Name the machine to which the following belong:
Sugar tongs
A lever of length 100 cm has the effort of 15 kgf at a distance of 40 cm from the fulcrum at one end. What load can be applied at its other end?
Lemon juicer belongs to which type of lever? Why?
Match the following:
| 1. | Class I lever | a. | Wheelbarrow |
| 2. | Class II lever | b. | Seesaw |
| 3. | Class III lever | c. | Axe |
| 4. | Wedge | d. | Hockey sick |
Name the class of the lever shown in the picture below:
Classify the following into levers:
Claw hammer
