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प्रश्न
State if the following statement is true or false. Correct the statement if it is false.
There are four types of simple machines.
पर्याय
True
False
उत्तर
False.
There are six types of simple machines.
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संबंधित प्रश्न
Name six simple machines. Give an example of each machine.
Can a machine have an efficiency of 100%? Give a reason to support your answer.
What is an ideal machine?
Give an example of the following uses of a machine:
to obtain gain in speed
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?
(i) Calculate the mechanical advantage of the lever shown in the figure.
(ii) How do you define the mechanical advantage of a machine?
Classify the following as a lever, a pulley and an inclined plane:
A staircase
Classify the following as a lever, a pulley and an inclined plane:
A slide
Classify the following as a lever, a pulley and an inclined plane:
A crane
