Question

State when the following situations are possible and give an example of each:
(a) An object with constant acceleration but with zero velocity.
(b) An object moving in a certain direction with an acceleration in the perpendicular direction.

Answer 1

Hey mate here is your answer....

a. When an object is thrown in upward direction, at the maximum height thevelocity of the object becomes zero but still in that condition a constant acceleration due to gravity is working. (b) Object moving in a certain direction with an acceleration in perpendicular direction is possible; in case of circular motion.

b. Object moving in a certain direction with an acceleration inperpendicular direction is possible; in case of circular motion. ... We know, that a tangent always makes a right angle with the radius; so when an object is in circular motion, theacceleration and velocity are in mutually perpendicular direction.

Hope this will help you...

Answer 2

(a)when object is thrown vertically upward and when its on its highest peak its velocity is zero but acceleration is still there in the object in form of (g)gravitational accln.