Question

q. what will be the direction of acceleration when- 1)only direction of velocity changes. 2) only magnitude of velocity changes. 3) both magnitude and direction of velocity changes

Answer 1

a) An object which experiences either achange in the magnitude or thedirection of the velocity vector can be said to be accelerating. This explains why an object moving in a circle at constant speed can be said toaccelerate - the direction of thevelocity changes.

b) Accelerating objects are objects which are changing their velocity - either thespeed (i.e., magnitude of the velocityvector) or the direction. An object undergoing uniform circular motion is moving with a constant speed.

c)