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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
Scissors
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उत्तर
Scissors – A lever
संबंधित प्रश्न
Answer the following.
What do you understand by a complex machine?
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.
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)?
Define Efficiency
Write an expression for the mechanical advantage of an inclined plane.
Classify the following as a lever, a pulley and an inclined plane:
The wheel of a flagpole
Classify the following as a lever, a pulley and an inclined plane:
Nutcrackers
Why is this so machines have to be maintained?
Simple machines usually exchange a larger force to move a heavy object.
