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प्रश्न
When is work said to be done by a force?
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उत्तर
Work is said to be done when a force moves an object through a distance in its own direction.
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संबंधित प्रश्न
Answer the following.
What is a machine?
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.
Why is a machine not 100% efficient?
Can a simple machine act as a force multiplier and a speed multiplier at the same time?
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 second order.
Which machine will you use to do the following work? Write their type.
To cut vegetables.
What is a lever?
