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A block is stationary on a rough incline...

A block is stationary on a rough inclined plane. How many forces are acting on the block?

A

2

B

3

C

4

D

5

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A block of mass m is placed on a rough inclined plane. The corfficient of friction between the block and the plane is mu and the inclination of the plane is theta .Initially theta=0 and the block will remain stationary on the plane. Now the inclination theta is gradually increased . The block presses theinclined plane with a force mgcostheta . So welding strength between the block and inclined is mumgcostheta , and the pulling forces is mgsintheta . As soon as the pulling force is greater than the welding strength, the welding breaks and the blocks starts sliding, the angle theta for which the block start sliding is called angle of repose (lamda) . During the contact, two contact forces are acting between the block and the inclined plane. The pressing reaction (Normal reaction) and the shear reaction (frictional force). The net contact force will be resultant of both. Answer the following questions based on above comprehension: Q. If mu=(3)/(4) then what will be frictional force (shear force) acting between the block and inclined plane when theta=30^@ :

A block of mass m is placed on a rough inclined plane. The corfficient of friction between the block and the plane is mu and the inclination of the plane is theta .Initially theta=0 and the block will remain stationary on the plane. Now the inclination theta is gradually increased . The block presses theinclined plane with a force mgcostheta . So welding strength between the block and inclined is mumgcostheta , and the pulling forces is mgsintheta . As soon as the pulling force is greater than the welding strength, the welding breaks and the blocks starts sliding, the angle theta for which the block start sliding is called angle of repose (lamda) . During the contact, two contact forces are acting between the block and the inclined plane. The pressing reaction (Normal reaction) and the shear reaction (frictional force). The net contact force will be resultant of both. Answer the following questions based on above comprehension: Q. For what value of theta will the block slide on the inclined plane:

A block of mass m is placed on a rough inclined plane. The corfficient of friction between the block and the plane is mu and the inclination of the plane is theta .Initially theta=0 and the block will remain stationary on the plane. Now the inclination theta is gradually increased . The block presses theinclined plane with a force mgcostheta . So welding strength between the block and inclined is mumgcostheta , and the pulling forces is mgsintheta . As soon as the pulling force is greater than the welding strength, the welding breaks and the blocks starts sliding, the angle theta for which the block start sliding is called angle of repose (lamda) . During the contact, two contact forces are acting between the block and the inclined plane. The pressing reaction (Normal reaction) and the shear reaction (frictional force). The net contact force will be resultant of both. Answer the following questions based on above comprehension: Q. If the entire system, were accelerated upward with acceleration a the angle of repose, would:

A block of mass m takes time t to slide down on a smooth inclined plane of angle of inclination theta and height h. If same block slids down on a rough inclined plane of same angle of inclination and same height and takes time n times of initial value, then coefficient friction between block and inclined plane is

Statement I: A block is lying stationary as on inclined plane and coefficient of friction is mu . Friction on block is mu mg cos theta . Statement II: Contact force on block is mg.

AAKASH INSTITUTE ENGLISH-LAWS OF MOTION-EXERCISE
  1. The tension in the string connected between blocks is

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  2. A block of mass m as shown in figure is pulled by a force 40N. The ten...

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  3. A block is stationary on a rough inclined plane. How many forces are a...

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  4. In the given arrangement, the normal force applied by block on the gro...

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  5. A book of mass 5 kg is placed on a table and it is pressed by 10 N for...

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  6. Three blocks are placed as shown in figure. Mass of A, B and C are m(1...

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  7. The value of (T(3))/(T(1)) is

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  8. A block of mass 10 kg is moving on a rough surface as shown in figure....

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  9. The maximum value of F which can be applied on the system shown in fig...

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  10. In the given arrangement the maximum value of F for which there is no ...

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  11. If acceleration of A is 2m//s^(2) which is smaller than acceleration o...

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  12. Acceleration of block A varies with time as shown in figure the value ...

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  13. Block of mass 10 kg is moving on inclined plane with constant velocity...

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  14. The ratio of acceleration of blocks A placed on smooth incline with bl...

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  15. A block of mass 10 kg is released on rough incline plane. Block start ...

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  16. Blocks shown in figure moves with constant velocity 20 m/s towards rig...

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  17. In the previous problem. The friction force applied by ground on block...

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  18. A block of mass 10 kg is kept on a fixed rough (mu=0.8) inclined plan...

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  19. A block of mass 5 kg is at rest on a rough inclined surface. If angle ...

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  20. Maximum force of friction is called

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