Advertisements
Advertisements
प्रश्न
What is an ideal machine?
Advertisements
उत्तर
A machine in which no part of the work done on the machine is wasted is called an ideal or perfect machine. Thus, for an ideal machine, the work output is equal to the work input, i.e., the efficiency of an ideal machine is 1 (or 100 percent).
APPEARS IN
संबंधित प्रश्न
What is the principle on which a machine works?
Can a machine have an efficiency of 100%? Give a reason to support your answer.
Define mechanical advantage (M.A.) of the machine.
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.
How does a machine work?
Classify the following as a lever, a pulley and an inclined plane:
An opener
Classify the following as a lever, a pulley and an inclined plane:
A crane
What is a lever?
Name some simple machines.
Name a machine for each of the following uses:
- to multiply the force,
- to change the point of application of force,
- to change the direction of force,
- to obtain the gain in speed.
