Question

1) When seen from below, the blades of
a ceiling fan are seen to be revolving
anticlockwise and their speed is
decreasing. Select correct statement
about the directions of its angular
velocity and angular acceleration
(A) Angular velocity upwards, angular
acceleration downwards.
(B) Angular velocity downwards,
angular acceleration upwards.
(C) Both, angular velocity and angular
acceleration, upwards.
(D) Both, angular velocity and
angular acceleration, downwards.​

Answer 1

Answer:

YᎾᏌᎡ ᎪNᏚᏔᎬᎡ

Explanation:

ᎻᎾᏢᎬ ᏆᎢ ᎻᎬᏞᏢᏚ Ꮜ ᎷᎪᎢᎬ.....

Answer 2

Answer:

B) Angular velocity downward, angular acceleration upward.

Explanation:

The direction of both parameter can be found using right hand thumb rule.

As the fan is rotating anti-clockwise as observed from below, right hand thumb rule gives its direction to be downward.

As the fan is decelerating, the force responsible is acting in the opposite direction of rotation. Hence right hand thumb rule gives upward direction.