If there's a body moving in a circle with constant speed, and you come along
and do work on it, then either its speed will change, or it will depart from the
circle, or both.
The force that's keeping it on the circular path is not doing any work on it.
velocity
Yes. The simplest example is an object moving at a constant speed in a circle.
Of course. In fact, in order to have constant velocity, it must have constant speed.What you really want to know: Can a body have changing velocity when it has constant speed ?The answer to that one is also "yes", for example when it is moving in a circle, the speed is constant but the velocity is changing all the time (in direction).
Yes, if you are going in a circle or otherwise changing direction.
Yes, if you are going in a circle or otherwise changing direction.
Yes, if you are going in a circle or otherwise changing direction.
A body is being accelerated if its speed OR direction are changing.A satellite in a perfectly circular orbit around the earth ... like a TV satellite ... is moving at constant speed. But, technically, since its direction is always changing, to keep it on a circle, it's experiencing constant acceleration.
If body is moving in a circle with uniform or constant speed its acceleration will be uniform as velocity i.e. to say direction is changing at every point.
Speed is a scalar quantity while velocity is a vector quantity.It is possible that an object can have constant speed but if speed is constant while direction of motion is changing constantly then it means that body has variable velocity.An example of this phenomena is a body moving in a circle whose speed is constant but velocity is changing every instant due to change in direction at every instant.
If the speed of the object doesn't change, then yes.
when a body move with uniform speed
Yes; if the direction changes (for instance, if an object moves in a circle), even if its speed doesn't change, its velocity changes. This is because the term "velocity" also includes the direction.