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प्रश्न
Which machine will you use to do the following work? Write their type.
To remove the lid of a tin.
उत्तर
To remove the lid of a tin, we should use an opener, which is a second-order lever.
संबंधित प्रश्न
Answer the following in short.
Mention any two methods by which we can take care of machines.
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.
Write an expression for the mechanical advantage of an inclined plane in terms of its length I and vertical height h.
State whether the mechanical advantage of an inclined plane is equal to 1, less than 2 or greater than 1?
Can a machine be 100% efficient?
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple 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.
What is the efficiency of a machine?
Why is this so traveller’s bags have wheels?
The idea of a simple machine originated with the Greek philosopher Archimedes.
