Objects moving at constant speed in a straight line are said to be in equilibrium. That is there is no force acting on them. If a force was acting there would be aceleration and the velocity would change.
A car moving at constant speed in a straight line is also moving at constant velocity.
Objects moving in uniform circular motion will have a constant speed, and two objects with the same acceleration have a constant velocity.
-- An object with no net force on it continues moving at constant speed in a straight line.If it's not moving in a straight line, then there must be net force acting on it.-- "Acceleration" is the word for the situation where either speed or direction of motion changes.Even if speed is constant, acceleration is present if the direction is changing.
No. An object is accelerating if it is changing speed or direction of travel. Since the person in question is running at a constant speed in a straight line, they are not accelerating.
there is no acceleration if the body is moving with constant velocity
A car moving at constant speed in a straight line is also moving at constant velocity.
When acceleration is zero, then the object is moving in a straight line with constant speed. (That's the effective meaning of constant velocity.)
Yes. An object moving in a straight line at constant speed has constant velocity.
When it's moving in a straight line at a constant speed. And it has nothing to do with my judgment or opinion. That's the definition.
-- An object with no net force on it continues moving at constant speed in a straight line.If it's not moving in a straight line, then there must be net force acting on it.-- "Acceleration" is the word for the situation where either speed or direction of motion changes.Even if speed is constant, acceleration is present if the direction is changing.
Objects moving in uniform circular motion will have a constant speed, and two objects with the same acceleration have a constant velocity.
It will have zero force BUT, it WILL have a constant velocity
It means moving at a constant speed ... not speeding up or slowing down ... and in a straight line.
It's not necessary to specify that the object is moving at a constant speed. Any object with no outside forces acting on it does that. It also continues moving in a straight line.
If it's moving in a curve or some other non-straight path, then yes. If it's moving in a straight line, then no.
Sure. If all of the forces on an object are balanced, then the object continues moving in a straight line at constant speed. All of the forces on an airplane cruising in level flight, or on a car on cruise-control on a straight piece of road, are balanced.
No. An object is accelerating if it is changing speed or direction of travel. Since the person in question is running at a constant speed in a straight line, they are not accelerating.