Advertisements
Advertisements
Question
Which type of lever has a mechanical advantage always more than one? Give one example. What change can be made in this lever to increase its mechanical advantage?
Advertisements
Solution
The mechanical advantage of Class II levers is always greater than one. This is because the load and effort are on the same side of the fulcrum but in different directions, and the effort arm is always greater than the load arm. Therefore, the mechanical advantage is always bigger than one.
Example: a nutcracker.
We can increase the length of the effort arm to increase its mechanical advantage.
APPEARS IN
RELATED QUESTIONS
Name the class to which the following lever belong:
A pair of scissors
Draw diagram to illustrate the position of fulcrum, load, and effort, of the following:
a see-saw.
Draw diagram to illustrate the position of fulcrum, load, and effort, of the following:
a pair of forceps
Name the machine to which the following belong:
Beam balance
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.
Tick the most appropriate answer.
A pair of scissors is an example of a/an
What is the use of the lever if its mechanical advantage is
- more than 1,
- equal to 1, and
- less than 1?
Name the load, effort, and fulcrum.
 |
 |
 |
|
1. ______ 2. ______ 3. ______ |
1. ______ 2. ______ 3. ______ |
1. ______ 2. ______ 3. ______ |
A ______ lever will always have M.A. > 1.
Classify the following into levers:
Sugar tongs
