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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
A knife
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उत्तर
A knife – An inclined plane
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संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
What is an ideal machine?
What care would you take to increase the life span of a machine which you use?
Answer the following.
What is a machine?
Answer the following in short.
Mention any two methods by which we can take care of machines.
The mechanical advantage of an inclined place is always:
(a) less than 1
(b) equal to 1
(c) greater than 1
(d) nothing can be said
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?
Classify the following as a lever, a pulley and an inclined plane:
The wheel of a flagpole
Classify the following as a lever, a pulley and an inclined plane:
An opener
Which machine will you use to do the following work? Write their type.
To remove the lid of a tin.
