When seen from below, the blades of a ceiling fan are seen to be revolving anticlockwise and their speed is decreasing. Select the correct statement about the directions of its ang... When seen from below, the blades of a ceiling fan are seen to be revolving anticlockwise and their speed is decreasing. Select the correct statement about the directions of its angular velocity and angular acceleration. 1. A particle of mass 1 kg, tied to a 1.2 m long string is whirled to perform vertical circular motion under gravity. Minimum speed of the particle is 5 m/s. Consider the following statements: P. Maximum speed must be 5√5 m/s. Q. Difference between maximum and minimum tensions along the string is 60 N. Select the correct option. Select the correct statement about the principle of conservation of angular momentum.
Understand the Problem
The question is a physics problem involving angular velocity, angular acceleration, and the principles of circular motion. It specifically asks for the correct statement related to the motion observed in a ceiling fan, as well as additional statements regarding the motion of a particle tied to a string and the conservation of angular momentum in different scenarios.
Answer
Angular velocity upwards, angular acceleration downwards.
The correct statement is (A) Angular velocity upwards, angular acceleration downwards.
Answer for screen readers
The correct statement is (A) Angular velocity upwards, angular acceleration downwards.
More Information
When the speed of rotation is decreasing, the angular acceleration is opposite to the direction of angular velocity.
Tips
A common mistake is confusing the direction of angular acceleration when the object's speed is decreasing.
Sources
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