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| Q. |
Which of the following statement is wrong? |
| A. | A force acting in the opposite direction to the motion of the body is called force of friction. |
| B. | The ratio of the limiting friction to the normal reaction is called coefficient of friction. |
| C. | A machine whose efficiency is 100% is known as an ideal machine. |
| D. | The velocity ratio of a machine is the ratio of load lifted to the effort applied. |
| Answer» D. The velocity ratio of a machine is the ratio of load lifted to the effort applied. | |
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