Advertisements
Advertisements
Question
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.
Solution
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
RELATED QUESTIONS
Name the class to which the following lever belong:
A pair of scissors
Name the class to which the following lever belong:
a pair of sugar tongs
The diagram given below shows the three kinds of levers. Name the class of lever and give one example of the class.
Answer the following in a word or two or in a sentence.
Which type of machine is used to squeeze a lemon?
Answer the following in a word or two or in a sentence.
Give one example of a machine used to multiply speed.
Give one example of a class I lever where mechanical advantage is less than 1.
Class III levers have mechanical advantage less than one. Why are they then used?
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:
Sugar tongs
