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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
A knife
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उत्तर
A knife – An inclined plane
संबंधित प्रश्न
State whether the following statement is True or False.
In an ideal machine, work done on load is equal to the work done by effort.
Define the term ‘work input’ and ‘work output’ in relation to a machine.
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
A crowbar of length 120 cm has its fulcrum situated at a distance of 20 cm from the load. Calculate the mechanical advantage of the crowbar.
Write an expression for the mechanical advantage of an inclined plane in terms of its length I and vertical height h.
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)?
Define Simple machine
Can a simple machine act as a force multiplier and a speed multiplier at the same time?
Which machine will you use to do the following work? Write their type.
To cut vegetables.
Why is this so traveller’s bags have wheels?
