Class -V
Physics
Time-20 min FM - 10 ---------------------------------------------------------------------------------------------
1. What is mechanical advantage? Write the S.I. unit of mechanical advantage. [2]
2. Define load arm. Write the C.G.S. unit of the load arm. [2]
3. On which basis levers are divided? [2]
4. Calculate the work done in (a) if a force of 250 N pushes through 3.5 m and (b) if an effort of 50 N raises a sack of rice through a height of 30m. [2+2]
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