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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
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उत्तर
False.
There are six types of simple machines.
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संबंधित प्रश्न
State whether the following statement is True or False.
A boy does work while pushing a wall.
State whether the following statement is True or False.
In an ideal machine, work done on load is equal to the work done by effort.
State if the following statement is true or false. Correct the statement if it is false.
Work done by a machine is always more than the work done on a 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?
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple machine.
What is the relationship between the mechanical advantage and the velocity ratio for:
- An ideal machine,
- A practical machine.
Classify the following as a lever, a pulley and an inclined plane:
Nutcrackers
What is meant by simple machines?
The idea of a simple machine originated with the Greek philosopher Archimedes.
