Advertisements
Advertisements
Question
Select the correct alternative:
For an ideal machine, the efficiency is
Options
greater than unity
less than unity
equal to unity
depends on the value of load
Advertisements
Solution
equal to unity
APPEARS IN
RELATED QUESTIONS
Name six simple machines. Give an example of each machine.
Derive the relationship between mechanical advantage, velocity ratio and efficiency of a machine.
A crowbar of length 120 cm has its fulcrum situated at a distance of 20 cm from the load. Calculate the mechanical advantage of the crowbar.
State whether the mechanical advantage of an inclined plane is equal to 1, less than 2 or greater than 1?
What is an ideal machine?
Can a machine be 100% efficient?
Give an example of the following uses of a machine:
to obtain gain in speed
How does a machine work?
Classify the following as a lever, a pulley and an inclined plane:
A slide
Which machine will you use to do the following work? Write their type.
To cut vegetables.
