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

Question

Assertion (A): The angle between acceleration and velocity of a body in one dimensional motion is always zero. Reason (R): One dimensional motion is along a straight line. (A) Both (A) and (R) are true and (R) is the correct explanation of (A) (B) Both (A) and (R) are true but (R) is not the correct explanation of (A) (C) is true but (R) is false (D) is false but (R) is true

Tardigrade Admin · Accepted Answer

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.

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

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true but (R) is not the correct explanation of (A)

is true but (R) is false

is false but (R) is true

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 $18 0^{\circ}$ or $0^{\circ}$ . Reason is correct.

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