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प्रश्न
A pair of scissors is a _____ multiplier.
उत्तर
A pair of scissors is a speed multiplier.
संबंधित प्रश्न
State whether the following statement is True or False.
A boy does work while pushing a wall.
Can a machine have an efficiency of 100%? Give a reason to support your answer.
A machine is 75% efficient’. What do you understand by this statement?
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 .
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
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)?
Classify the following as a lever, a pulley and an inclined plane:
A wedge
Classify the following as a lever, a pulley and an inclined plane:
A needle
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.
Which machine will you use to do the following work? Write their type.
To lift bricks to the top of a tall building.
