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प्रश्न
Name some simple machines.
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उत्तर
Simple machines are pulley, wedge, inclined plane, screw, lever, wheel, and axle.
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संबंधित प्रश्न
Answer the following.
What do you understand by a complex machine?
Give two examples of inclined plane where it is used to raise a heavy load with less effort ?
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)?
What is the efficiency of a machine?
(i) Calculate the mechanical advantage of the lever shown in the figure.
(ii) How do you define the mechanical advantage of a machine?
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.
______ help us to make work easier.
