In a two dimensional motion, instantaneous speed v_(0) is a positive constant. Then which of the following are neccessarily true?

In a two dimensional motion, instantaneous speed v_(0) is a positive c

1.	In a two dimensional motion, instantaneous speed v_(0) is a positive constant. Then which of the following are neccessarily true?
Answer» The acceleration of the PARTICLE is zero. The acceleration of the particle is BOUNDED. The acceleration of the particle is necessarily in the plane of motion. The particle must be undergoing a UNIFORM circular motion. Solution :In two dimensional motion, if instantaneous speed is a postitive constant, then the acceleration of the particle is necessarily in the plane of motion.