The figure shows four pulleys, each with a heavy and a light block strung over t

Question

The figure shows four pulleys, each with a heavy and a light block strung over them. The blocks' velocities are shown.

What are the signs of the angular velocity and angular acceleration of the pulley in case (a)?

What are the signs of the angular velocity and angular acceleration of the pulley in case (b)?

What are the signs of the angular velocity and angular acceleration of the pulley in case (c)?

What are the signs of the angular velocity and angular acceleration of the pulley in case (d)?

? > 0, ? > 0

? < 0, ? > 0

? > 0, ? < 0

? < 0, ? < 0

Explanation / Answer

if u take clockwise as positive, then for
a)the third option
b)the second option
c)the first option
d)the last option

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