Advertisements
Advertisements
प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
An opener
Advertisements
उत्तर
An opener – A lever
संबंधित प्रश्न
State whether the following statement is True or False.
A boy does work while pushing a wall.
Select the correct alternative:
For an ideal machine, the efficiency is
Define the term ‘work input’ and ‘work output’ in relation to a machine.
What care would you take to increase the life span of a machine which you use?
The diagram below shows a wheel barrow. Mark position of fulcrum F and draw arrows to show the directions of load L and effort E. What class of lever is the whell barrow? Give one more example of the same class of lever.
What is an ideal machine?
Give scientific reason for the following:
Passengers in a bus are pushed backward when it starts suddenly.
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?
Classify the following as a lever, a pulley and an inclined plane:
An axe
Which machine will you use to do the following work? Write their type.
To hold a papad for roasting it.
