Question

Statement I: Retardation is directed opposite to the velocity.
Statement II: Retardation is equal to the time rate of decrease of velocity.

• A. Both statement 1 and statement 2 are correct and statement 2 is the correct explanation of statement 1.
• B. Both statement 1 and statement 2 are correct and statement 2 is not the correct explanation of statement 1.
• C. Statement 1 is correct and statement 2 is incorrect.
• D. Statement 1 is incorrect and statement 2 is correct.

Answer 1

The correct option is A Both statement 1 and statement 2 are correct and statement 2 is the correct explanation of statement 1.

Retardation is equal to the time rate of decrease of velocity.
$\Rightarrow$ Retardation $=-\frac{dv}{dt}$
So, when there is retardation, velocity decreases.
This retardation will be oppositely directed to velocity.