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प्रश्न
Which machine will you use to do the following work? Write their type.
To cut vegetables.
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उत्तर
To cut vegetables, we should use a knife.
Type: Wedge (simple machine)
संबंधित प्रश्न
Answer the following.
What do you understand by a complex machine?
What is the purpose of a jack in lifting a car by it?
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?
Define mechanical advantage (M.A.) of the machine.
Comment on the statement ‘The mechanical advantage of a machine is greater than 1’. Give an example of a lever mechanical advantage is:
(i) greater than 1.
(ii) Equal to 1.
How does a machine work?
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 knife
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.
Name a machine for each of the following uses:
- to multiply the force,
- to change the point of application of force,
- to change the direction of force,
- to obtain the gain in speed.
