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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
An opener
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उत्तर
An opener – A lever
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.
Answer the following.
What is a machine?
Answer the following in short.
Mention any two methods by which we can take care of machines.
What is the purpose of a jack in lifting a car by it?
show a nut cracker In the diagram, mark the position of the fulcrum F and the line of action of load L and effort E .
Give an example of the following uses of a machine:
to obtain gain in speed
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)?
What is a lever?
The idea of a simple machine originated with the Greek philosopher Archimedes.
A pair of scissors is a _____ multiplier.
