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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
An opener
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उत्तर
An opener – A lever
संबंधित प्रश्न
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
Name six simple machines. Give an example of each machine.
State if the following statement is true or false. Correct the statement if it is false.
There are four types of simple machines.
What do you understand by a simple machine?
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
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?
Give an example of the following use of a machine to obtain gain in force.
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.
Which machine will you use to do the following work? Write their type.
To lift bricks to the top of a tall building.
Simple machines usually exchange a larger force to move a heavy object.
