An object that is accelerating may be slowing down, gaining speed, and changing direction.
An object is not accelerating when it is moving in a straight line at an unchanging speed (which may be zero).
An object is accelerating if any of these things are happening . . .-- its speed is increasing-- its speed is decreasing-- its direction is changing.The object may be accelerating even if its speed isn't changing.Acceleration does not mean "speeding up".
An accelerating object is one that is changing in either speed or direction. Thus any object that is turning is accelerating while maintaining a constant speed.
The object's velocityi will change.
Accelerating
An object is not accelerating when it is moving in a straight line at an unchanging speed (which may be zero).
An object that is accelerating may slow down, speed up, or change direction.
In a constant state of motion (which may actually be stationary).
An object is accelerating if any of these things are happening . . .-- its speed is increasing-- its speed is decreasing-- its direction is changing.The object may be accelerating even if its speed isn't changing.Acceleration does not mean "speeding up".
An accelerating object is one that is changing in either speed or direction. Thus any object that is turning is accelerating while maintaining a constant speed.
The object's velocityi will change.
If you add up all the forces acting on an object, they are balanced if they equal zero. (They cancel each other out). If the forces acting on a object are balanced, then the acceleration of that object is zero. It may still be moving, but it is not accelerating. An object that is not accelerating, (the sum of the forces acting on it is zero), is in equilibrium.
Accelerating...or was accelerating.
Accelerating
An object with a constant (vector)velocity is not accelerating. An object with a constand (scalar)speed can actually be accelerating, a car with a constant speed that passes around a corner is changing direction and is subjected to a lateral acceleration.
If the force acting upon an object are balanced then the object must not be accelerating
An object with an increasing speed is in fact accelerating, hence the acceleration vector may be continually changing (but >0) with time.