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प्रश्न
Which machine will you use to do the following work? Write their type.
To lift bricks to the top of a tall building.
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उत्तर
To lift bricks to the top of a tall building, we should use a crane, which is a pulley.
संबंधित प्रश्न
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?
Can a machine be 100% efficient?
Fig show a system of four pulleys. The upper two pulleys are fixed and the lower two are movable.
(i) Draw a string around the pulleys. Also show the place and direction in which the effort is applied.
(ii) What is the velocity ratio of the system?
(iii) What is the mechanical advantage of the system?
(iv) What assumption do you make in arriving at your answer in part (iii)?
Can a simple machine act as a force multiplier and a speed multiplier at the same time?
How does a machine work?
Classify the following as a lever, a pulley and an inclined plane:
A slide
Which machine will you use to do the following work? Write their type.
To cut vegetables.
What is a lever?
A pair of scissors is a _____ multiplier.
