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An eraser weighing 2N is pressed against...

An eraser weighing 2N is pressed against the black board with a force of 5N. If the coefficient of friction is 0.4. How much force parallel to the black board is required to slide the eraser upwards

A

2 N

B

2.8 N

C

4 N

D

4.8 N

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-LAWS OF MOTION-EXERCISE - II
  1. A horizontal force 10 N is necessary to just hold a block stationary a...

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  2. A person holds a block weighing 2kg between his hands & keeps it from ...

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  3. An eraser weighing 2N is pressed against the black board with a force ...

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  4. A block of mass 4kg is placed in contact with the front vertical surfa...

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  5. A book of weight 20 N is pressed between two hands and each hand exert...

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  6. A man of mass 40 kg is at rest between the walls as shown in the figur...

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  7. A wooden block is placed on an inclined plane. The block just begins t...

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  8. A block of mass 2 kg rests on a rough inclined plane making an angle o...

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  9. A body takes 1(1/3) times as much time to slide down a rough inclined ...

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  10. A block of mass 2kg is lying on a rough inclined plane. The force need...

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  11. A block sliding down a rough 45° inclined plane has half the velocity ...

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  12. A block is pushed up a rough inclined plane of 45°. If the time of des...

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  13. A rod AB of length 2L and mass m is lying on a horizontal frictionless...

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  14. A body is allowed to slide from the top along a smooth inclined plane ...

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  15. A particle is projected at an angle theta =30^@ with the horizontal, w...

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  16. A 30 kg block is to be moved up an inclined plane at an anglue 30° to ...

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  17. An engine of one metric ton is going up an inclined plane, 1 in 2 at t...

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  18. The minimum force required to move a body up an inclined plane is thre...

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  19. A body of mass 10kg is on a rough inclined plane having an inclination...

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  20. A block of wood of mass 0.5 kg is placed on a plane making 30° with th...

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