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A rain drop of radius 2mm falls from a h...

A rain drop of radius 2mm falls from a height of 500m above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original, height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational force on the drop in the first and second half of its journey? What is the work done by the resistive force in the entire journey if its speed on reaching the ground is 10m`s^(-1)`?

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MAXIMUM PUBLICATION-WORK ENERGY AND POWER -EXERCISE
  1. State if each of the following statements is true or false. Work done ...

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  2. State if each of the following statements is true or false. In an inel...

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  3. A rain drop of radius 2mm falls from a height of 500m above the ground...

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  4. A bullet of mass 0.012 kg and horizontal speed 70 ms^(-1) strikes a bl...

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  5. What is the quantity that remains conserved in all types of collisions...

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  6. Suppose an electron and a proton are projected with equal kinetic ener...

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  7. Collision between two particles need not be the physical contact of tw...

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  8. Work is related to force and displacement over which it acts. A man t...

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  9. Work is related to force and displacement over which it acts. Suggest ...

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  10. Work is related to force and displacement over which it acts. A body o...

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  11. A ball moves along a circle under the infulence of centripetal force. ...

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  12. An arrow shot from a bow has kinetic energy. How does it get this kine...

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  13. Show that total mechanical energy is conserved for a freely falling bo...

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  14. When brakes are applied on a moving vehicle, it stops after travelling...

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  15. When brakes are applied on a moving vehicle, it stops after travelling...

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  16. Ramesh lifts a body of mass 'm' to a height 'h' near surface of the ea...

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  17. According to the work- energy theorem, work done by a force on a body ...

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  18. A lorry and a car moving with the same kinectic energy are stopped by ...

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  19. A force is required to do work. The work done by a force is the produc...

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  20. Consider a body falling freely through the atmosphere. Neglecting the ...

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