Question
Physics Question on Motion in a straight line
An object may fall with a constant velocity. This happens when acceleration of the object is equal to acceleration due to gravity.
A
If both assertion and reason are true and reason is the correct explanation of assertion
B
If both assertion and reason are true but reason is not the correct explanation of assertion
C
If assertion is true but reason is false
D
If both assertion and reason are false
Answer
If assertion is true but reason is false
Explanation
Solution
Velocity of fall becomes constant when downward force due to acceleration is balanced by an upward force of retardation. This constant velocity of an object is known as terminal velocity.