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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.
विकल्प
True
False
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उत्तर
False.
There are six types of simple machines.
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संबंधित प्रश्न
Define the term ‘work input’ and ‘work output’ in relation to a machine.
Derive the relationship between mechanical advantage, velocity ratio and efficiency of a machine.
Give two examples of inclined plane where it is used to raise a heavy load with less effort ?
Give scientific reason for the following:
Passengers in a bus are pushed backward when it starts suddenly.
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?
Can a simple machine act as a force multiplier and a speed multiplier at the same time?
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
Which machine will you use to do the following work? Write their type.
To draw water from a well.
