Assertion (A) The angle between acceleration and velocity of a body is one-dimensionla motion is always zero.
Reason (R ) One -dimensional motion is along a straight line.

Options

A. Both (A) and (R ) are ture and ( R) is the correct explanation of (A).
B. Both (A) and (R ) are ture but (R ) is not the correct explanation of (A)
C. (A) is true but ( R) is false.
D. (A) is false but (R ) is true.

Answer

D

Explanation

Assertion is incorrect as during decceleration , i.e when body is slowing down, acceleration and velocity are directed opposite to each other Hence angle between a and v may be `180^(@)` or `0^(@)` Reason is correct .