Uniform motion: velocity doesn't change.
Periodic motion: velocity changes all the time in a uniform, repeated way. This is most often seen inorbitring and the like, when the change of velocity is a change in direction (and also speed) and the object eventually returns to (roughly) the same place in space.
meghana
The difference between simple harmonic motion and harmonic motion is SHM is a periodic motion.
Oscillatory motion is also called vibratory motion while periodic motion is a motion which is repeat itself after a specific interval. Periodic motion may be rotatory or vibratory.
what is difference between simple harmonic motion and vibratory motion?
Periodic, Variable, and Uniform motion.
linear is which is on a straight path and circular motion is which has a curved path. *In a uniform linear motion,the velocity is constant and the acceleration is zero.So,uniform linear motion is an unaccelerated motion. *In uniform circular motion the velocity can be variable although the speed is uniform.So,it is an accelerated motion.
periodic
vibratory means stationary with no motion, oscillatory means with uniform motion like pendulam.
rotational motion is the motion which always take circular path.Periodic motion means motion that repeats with the same inter-well of time.earth rotation is an eg. of rotational motion, at the same time it is a periodic motion.
Uniform motion is when an object travels equal distances in equal intervals of time for eg. a car on a highway. non uniform motion is when an object travels unequal distances in equal intervals of time for eg. a car in a crowded market
in uniform motion velocity not changes with time but in non uniform motion velocity changes with time.
retardation and deceleration in uniform linear motoin, they are same but in projectile motion they not the same