Question

So in 2D motion does the instantaneous acceleration always have to be along the same line as velocity( either 0 or 180 degrees)?

• A. Yes, It has to be either at 0 or 180 degree to the velocity
• B. It can also be perpendicular to velocity but not any other angle
• C. In 2D acceleration will not be a vector
• D. It can point in any arbitrary direction

Answer 1

The correct option is D

It can point in any arbitrary direction

It can point in any arbitrary direction. For example in case of circular motion, accelaration and velocity may point in different directions