An object travels in a circular path at constant speed. Which statement about the object is correct? A It has changing kinetic energy. B It has changing momentum. C It has constant velocity. D It is not accelerating.
1 Answer
Mar 17, 2018
Explanation:
kinetic energy depends on magnitude of velocity i.e
Now, if speed remains constant,kinetic energy doesn't change.
As,velocity is a vector quantity,while moving in a circular pathway,though its magnitude is fixed but direction of velocity changes,so velocity doesn't remain constant.
Now,momentum is also a vector quantity,expressed as
Now,as velocity is not constant,the particle must be accelerating, as