Advertisements
Advertisements
प्रश्न
Select the correct alternative:
For an ideal machine, the efficiency is
विकल्प
greater than unity
less than unity
equal to unity
depends on the value of load
Advertisements
उत्तर
equal to unity
APPEARS IN
संबंधित प्रश्न
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
A machine is 75% efficient’. What do you understand by this statement?
show a nut cracker In the diagram, mark the position of the fulcrum F and the line of action of load L and effort E .

Give an example where a machine is used to obtain gain in speed.
Classify the following as a lever, a pulley and an inclined plane:
A needle
Classify the following as a lever, a pulley and an inclined plane:
A knife
What is a lever?
Why is this so traveller’s bags have wheels?
Rearrange the letters and find out the name of the tool.

R L E V E
| ______ | ______ | ______ | ______ |
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.
