Question

When an object undergoes acceleration (a) there is always an increase in its velocity (b) there is always an increase in its speed (c) a force always acting on it (d) all of the above.

Answer 1

all of the above ... as when an object under goes acceleration its velocity changes...and if the motion is along a straight line then speed replaces velocity and hence it also changes ...and a force will definitely be acting on the body that drags it forward