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# If acceleration is zero does velocity have to be zero?

No. Acceleration is the change of velocity. If velocity is constant, at any speed, acceleration is zero.

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## Related Questions

If an object has zero acceleration, its velocity doesn't have to be zero. Acceleration is a measure of the change in velocity over time. Zero acceleration means there is no change in velocity over time, namely constant velocity. Constant velocity can be any velocity (including zero velocity or "at rest"), so the object's velocity doesn't have to be zero to have zero acceleration.

Acceleration refers to the change of velocity per time unit. If the velocity doesn't change, acceleration is zero.

Whenever velocity is constant, the acceleration is zero. This also works when the velocity is zero, the acceleration is zero. That pretty much means the object isn't moving. But, yes/ If velocity is constant, accleration is zero.

Only for an instant. Acceleration is a change in velocity. When the derivative of acceleration with respect to time is zero, the velocity would be zero.

Acceleration is the CHANGE in velocity; you're assuming CONSTANT velocity. So the acceleration is zero.

Acceleration is changing velocity. Zero velocity means no motion. Zero acceleration means constant, unchanging motion.

yes the acceleration is at zero because there is no change in acceleration if the velocity is constant

At terminal velocity (constant velocity), the acceleration is zero, but prior to that, there is a downward acceleration.

The average acceleration from zero is the final velocity divided by the amount of time to reach that velocity.

Yes. A body having zero velocity has a constant acceleration of zero.

I'm not a scientist, but the following seems reasonable to me. If your frame of reference is the earth's surface, then it seems clear that an object can have zero velocity and zero acceleration. You could even have non-zero velocity and zero acceleration. What seems impossible is to have zero velocity and non-zero acceleration. When you think of accelaration think of changing velocity. A car moving straight down the highway at a constant speed of 55 mph is neither speeding up nor slowing down. Though it has velocity, there is no change in its velocity so acceleration will be zero. For a car parked on the side of the road, on the other hand, its velocity will be zero but what about its acceleration? Is velocity changing? No, so it will have zero velocity and zero acceleration.Yes.

Yes, an object can have a velocity of zero and an acceleration of zero. It's an object with a velocity of zero and no net applied force.

Yes. Acceleration is a change in velocity. With no acceleration, velocity remains constant, possibly at zero.

Acceleration is change of velocity. If velocity is constant ... "no change" ... then acceleration is zero.

Acceleration is the rate of change of velocity. Constant velocity means zero acceleration.

Yes, you can. Zero acceleration simply means there is no CHANGE in velocity. It doesn't mean there is no velocity.

You can't derive the velocity from the acceleration. Zero acceleration simply means that the velocity (at that instant) is not changing.

Definitely. Acceleration is defined as a change in velocity, so as long as the velocity doesn't change, acceleration is zero.

Yes...acceleration is the rate of change of velocity with time.....therefore when velocity is zero..definitely acceleration is zero This is not exactly true; at an instant in time the acceleration can be non-zero while the velocity is zero. However, this would change the velocity to non-zero after any amount of time. An example of this is when you throw a ball into the air: at it's highest point, the velocity is zero (it changes from going upward to going downward, passing through zero for an instant). However the acceleration is downward the entire time.

If the velocity is constant then there is no acceleration. The acceleration is zero.

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