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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.
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उत्तर
To hold a papad for roasting, we should use a pair of tongs, which is a third-order lever.
संबंधित प्रश्न
State if the following statement is true or false. Correct the statement if it is false.
There are four types of simple machines.
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.
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
State whether the mechanical advantage of an inclined plane is equal to 1, less than 2 or greater than 1?
Define velocity ratio.
Define efficiency.
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?
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple machine.
Classify the following as a lever, a pulley and an inclined plane:
A slide
What is meant by simple machines?
