A block A kept on an inclined surface just begins to slide if the inclination is 30°. The block is replaced by another block B and it is found that it just begins to slide if the inclination is 40°.
(a) mass of A > mass of B
(b) mass of A < mass of B
(c) mass of A = mass of B
(d) all the three are possible
Answers
Answer ⇒ Option (d). All the three are possibles. I meant that,
Mass of A > mass of B, mass of A < mass of B and mass of A = mass of B.
Explanation ⇒ Since, At first the block is not skidding means it is at rest. Now, Let us assume that the mass of the Block B is same as that of the first one, then it may possible that the angle between 30° to 40° may be angle of repose thus Block B starts skidding.
This may also possible that if the mass of the Block A will be less than Block B, than the component of the gravitational force acting along the incline will be more for Block B thus it starts sliding.
Now, Mass of the Block A may also be greater than B, but due to the angle of the Repose it is not falling means skidding along the incline.
Hence, all the options are equally correct. Therefore, Option (d). is correct.
Hope it helps.
Option (d). All the three are possibles.
Mass of A > mass of B, mass of A < mass of B and mass of A = mass of B.