Advertisements
Advertisements
प्रश्न
Which machine will you use to do the following work? Write their type.
To lift bricks to the top of a tall building.
Advertisements
उत्तर
To lift bricks to the top of a tall building, we should use a crane, which is a pulley.
संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
When is work said to be done by a force?
Define the term ‘work input’ and ‘work output’ in relation to a machine.
Can a machine have an efficiency of 100%? Give a reason to support your answer.
Answer the following.
What do you understand by a complex machine?
Write an expression for the mechanical advantage of an inclined plane in terms of its length I and vertical height h.
A simple machine enables us to lift a load of 10,000 N by the application of an effort of 500 N. However, when the point of application of the effort moves through 2.5 m, the load gets raised through 10 cm only. What are the values of the:
(i) M.A.
(ii) V.R. and
(iii) Efficiency of the machine?
Which machine will you use to do the following work? Write their type.
To draw water from a well.
What is meant by simple machines?
Why is this so traveller’s bags have wheels?
