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प्रश्न
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
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उत्तर
The useful work done by an actual machine is always less than the work done on the machine.
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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.
State if the following statement is true or false. Correct the statement if it is false.
Work done by a machine is always more than the work done on a machine.
State whether the mechanical advantage of an inclined plane is equal to 1, less than 2 or greater than 1?
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?
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple machine.
Classify the following as a lever, a pulley and an inclined plane:
A wedge
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.
______ help us to make work easier.
