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प्रश्न
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.
उत्तर
The effort in the centre, the load on one side and the fulcrum on the other side make a lever of the third order.
संबंधित प्रश्न
Select the correct alternative:
For an ideal machine, the efficiency is
State if the following statement is true or false. Correct the statement if it is false.
There are four types of simple machines.
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.
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?
What is the relationship between the mechanical advantage and the velocity ratio for:
(i) An ideal machine,
(ii) A practical machine.
What is the efficiency of a machine?
Classify the following as a lever, a pulley and an inclined plane:
A wedge
Why is this so traveller’s bags have wheels?
Identify and mention the types of simple machines.
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| ______ | ______ | _______ |
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| ______ | ______ | ______ |
