Question

A block of mass M slides down the inclined plane and then it moves on
the inclined plane on the right. The direction of frictional force acting on
block is
a) Downwards on left plane and upwards on right plane
b) Upwards on left plane and upwards of right plane
c) Downwards on left plane and downwards of right plane
d) Upwards on left plane and downwards of right plane​

Answer 1

Answer:

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Explanation:

Answer 2

Answer:

The correct answer is option B

Explanation:

• Gravity is pulling the ball's centre of mass downward and slowing it down in this case as it moves upward, but it has no effect on the ball's angular motion, which must be decreased in proportion to the linear motion reduction. Therefore, friction acts upward and promotes rolling.
• Gravity is pulling the ball downward in this instance as it is rolling down, so the ball begins to gain linear motion but not angular motion. Therefore, friction acts upward and promotes rolling.
• If, however, the ball were to roll up an inclined surface while being pulled by a string, friction would act as the net force acting downward on the ball while gravity would act as the upward force supporting linear motion.

Note: if v>rw, friction helps rotational motion and opposes linear motion,

• if v<rw, friction helps linear motion and opposes rotational motion.

Reference Link

• https://brainly.in/question/11564278