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प्रश्न
Which machine will you use to do the following work? Write their type.
To remove the lid of a tin.
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उत्तर
To remove the lid of a tin, a tin opener or can opener, which is a second-order lever machine, is used.
संबंधित प्रश्न
State whether the following statement is True or False.
A boy does work while pushing a wall.
What is an ideal machine?
Can a machine have an efficiency of 100%? Give a reason to support your answer.
What do you understand by a simple machine?
Give scientific reason for the following:
Passengers in a bus are pushed backward when it starts suddenly.
Give an example where a machine is used to obtain gain in speed.
Comment on the statement ‘The mechanical advantage of a machine is greater than 1’. Give an example of a lever mechanical advantage is:
(i) greater than 1.
(ii) Equal to 1.
What is the efficiency of a machine?
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.
Identify and mention the types of simple machines.
 |
 |
 |
| ______ | ______ | _______ |
 |
 |
 |
| ______ | ______ | ______ |
