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प्रश्न
What is meant by simple machines?
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उत्तर
Machines that have only one or two parts are called simple machines. Their structure is easy to understand and use. Examples include the nail cutter, bottle opener, and wheel used to push loads, etc.
संबंधित प्रश्न
When is work said to be done by a force?
State if the following statement is true or false. Correct the statement if it is false.
Work done by a machine is always more than the work done on a machine.
Give a reason for the following.
Machines are able to make our work convenient.
The correct relationship between the mechanical advantage (M.A.), the velocity ratio (V.R.) and the efficiency (n) is ______.
Write an expression for the mechanical advantage of an inclined plane in terms of its length I and vertical height h.
Give scientific reason for the following:
Passengers in a bus are pushed backward when it starts suddenly.
Classify the following as a lever, a pulley and an inclined plane:
A wedge
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.
Which machine will you use to do the following work? Write their type.
To cut vegetables.
______ help us to make work easier.
