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प्रश्न
Give an example of the following use of a machine to change the point of application of the force.
उत्तर
Rotating the wheel of a cycle by applying force on the paddle with the help of a chain.
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संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
What is an ideal machine?
Give a reason for the following.
Machines are able to make our work convenient.
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
Can a machine be 100% efficient?
Give scientific reason for the following:
Passengers in a bus are pushed backward when it starts suddenly.
Give an example of the following use of a machine to change the direction of force.
A simple machine enables us to lift a load of 10,000 N by the application of an effort of 500 N. However, when the point of application of the effort moves through 2.5 m, the load gets raised through 10 cm only. What are the values of the:
(i) M.A.
(ii) V.R. and
(iii) Efficiency of the machine?
Classify the following as a lever, a pulley and an inclined plane:
An opener
Identify and mention the types of simple machines.
 |
 |
 |
| ______ | ______ | _______ |
 |
 |
 |
| ______ | ______ | ______ |
