AP EAMCET201822 Apr 2018Evening ShiftPhysicsMotion in One DimensionActual
Assertion (A) The angle between acceleration and velocity of a body is one-dimensional motion is always zero. Reason (R) One-dimensional motion is along a straight line.
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A).
- BBoth (A) and (R) are true 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.
Correct answer
D. (A) is false but (R) is true.
Step-by-step solution
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.