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प्रश्न
State whether the following statement is True or False.
A boy does work while pushing a wall.
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उत्तर
This statement is false.
Explanation:
In physics, work is defined as force multiplied by displacement. Pushing a wall requires using force, yet the wall does not move (displacement is zero), hence the labor done is zero.
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संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
State if the following statement is true or false. Correct the statement if it is false.
There are four types of simple machines.
Give a reason for the following.
Machines are able to make our work convenient.
Classify the following as a lever, a pulley and an inclined plane:
A wedge
Classify the following as a lever, a pulley and an inclined plane:
A slide
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.
Identify and mention the types of simple machines.
 |
 |
 |
| ______ | ______ | _______ |
 |
 |
 |
| ______ | ______ | ______ |
Rearrange the letters and find out the name of the tool.
R L E V E
| ______ | ______ | ______ | ______ |
The idea of a simple machine originated with the Greek philosopher Archimedes.
Simple machines makes work easier by trading ______ for force.
