Long-answer questions.
a. Briefly describe how an inclined plane, a wedge and a pulley make our work easier.
b. Write in short about the three classes of lever with examples.
c. What do you mean by fulcrum, load and effort in a lever? Draw a simple diagram.
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Answers
Answer:
inclined plane makes it easier to move an object. It takes less force to move an object in an upward direction on an inclined plane than it does to lift the object straight up. ...
First Class Lever
This is a type of lever which has the fulcrum in between the weight and the force applied. Its order is represented as force-fulcrum-weight. This is the most basic type of lever.
EG - Our hand pushing an object or seesaws, crowbars.
Second Cass Lever
In this, the fulcrum is at one end and the force applied is on the other end. The weight is situated in the middle of these two. The order of this would be fulcrum-weight-force. The application of force at one end will result in some work done on the other end.
EG - Staplers
Third Class Lever
These are the levers in which the fulcrum is at one end and the force is applied in the middle and the weight is on the other end. The order is represented as a weight-force-fulcrum. In this case, we have to apply more energy to displace the weight to a longer distance
EG - Fishing rod
Explanation:
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