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प्रश्न
Which machine will you use to do the following work? Write their type.
To hold a papad for roasting it.
उत्तर
To hold a papad for roasting it, we should use a tong, which is a third-order lever.
संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
What do you understand by a machine?
Can a machine have an efficiency of 100%? Give a reason to support your answer.
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 .
Define Simple machine
Fig. shows a spade. It is being used to lift soil weighing 30N from the ground.
(a) Mark the direction of the least force on the handle necessary to keep the spade balanced.
(b) Calculate the least force on the handle necessary to keep the spade balanced (the weight of the spade is negligible).
(c) If the left hand was move towards the soil on the spade, would the force on the handle necessary to keep the soil balance the greater or less? Give a reason for your answer.
(d) To which class of lever does the spade belong?
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.
Classify the following as a lever, a pulley and an inclined plane:
A crane
Why is this so traveller’s bags have wheels?
______ help us to make work easier.
