A body is traversing on the x-y plane with constant speed. At the start of the motion, the particles velocity is 40^i and after 30 sec its velocity becomes 40^j. Find the average acceleration.
The position of a body in one dimensional motion varies with time as x=24t -3t2 . What is the nature of its motion? Find a) its velocity after 4 sec. b) Its acceleration and c) its average velocity from t=0 during the interval when the velocity is positive.