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The earth is in orbit about the sun. It plods along in its orbit at close to 30 kilometers per second. But it is not moving in a straight line, as you know. It is following the curve of its orbital path. Earth's inertia and the gravitational attraction between the sun and the Earth are in equilibrium here, and though its speed is constant, its direction of travel is actually changing from moment to moment. That means its velocity is constantly changing. (Note that the actual speed of earth varies a bit through its orbit, but from moment to moment, the change of speed is miniscule.)
Speed is distance (displacement) per unit of time. In this case, we have 30 km/sec for the earth. But when we consider velocity, we find that velocity is speed plus a direction vector. Though the speed of the earth is constant in its orbit, it is constantly changing direction and following its orbital path. Earth has a constant speed in its orbit, but its velocity is constantly changing because the direction it is traveling changes from moment to moment.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoA Bowling ball rolling straight down the alley.
The best example of velocity without acceleration would be a spaceship that is
drifting in free space with no huge gravitating bodies[planets or stars nearby].
On earth or even on a very smooth bowling alley table there is always some
frictional force that is contributing a corresponding deceleration however small.
A bowling ball set in motion has acceleration during the initial push to get it moving.
A skydiver who has opened his parachute, reached terminal velocity, and is now
drifting down at constant speed, has velocity and no acceleration.
Wiki User
∙ 13y agoWhen a ball is thrown up in the air there is a moment, when the ball reaches its maximum height, the velocity of the ball is zero, and acceleration due to gravity still exists [downwards]. If the velocity is zero, the acceleration is not necessarily zero.
Wiki User
∙ 11y agoAcceleration is a change in velocity over time. Velocity has both speed and direction. A body moving in circular motion at constant speed is still accelerating because its direction is constantly changing. If either speed or direction changes, or if both change, the body is accelerating.
Wiki User
∙ 12y agoWell velocity is mass * acceleration, so if you add weight while keeping the same speed, that would be a change in velocity.
Wiki User
∙ 9y ago-- a car driving along a straight highway at a steady speed
-- anything else moving with constant speed in a straight line
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If an object is moving at a constant velocity what do you know about its acceleration?
"Acceleration" means change of velocity. If velocity is constant, then acceleration is zero.
Zero acceleration will the velocity be constant?
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.
How is velocity of zero different from an accerlation at zero?
Acceleration is changing velocity. Zero velocity means no motion. Zero acceleration means constant, unchanging motion.
How is acceleration due to gravity be zero in a parachute?
At terminal velocity (constant velocity), the acceleration is zero, but prior to that, there is a downward acceleration.
Can you have a zero acceleration but non zero velocity explain it with help of a graph?
Yes, you can. Zero acceleration simply means there is no CHANGE in velocity. It doesn't mean there is no velocity.
If an object is moving at a constant velocity what do you know about its acceleration?
"Acceleration" means change of velocity. If velocity is constant, then acceleration is zero.
Zero acceleration will the velocity be constant?
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.
Why is acceleration zero when the body is moving with a constant velocity?
Acceleration is the CHANGE in velocity; you're assuming CONSTANT velocity. So the acceleration is zero.
What is your acceleration if you have a constant velocity?
If your velocity is constant, then your acceleration is zero.
Can there be a body moving with constant acceleration but zero velocity. With examples?
since accelaration is the change in velocity of an object per unit time......if velocity is zero then there is no acceleration.its nt possible
How is velocity of zero different from an accerlation at zero?
Acceleration is changing velocity. Zero velocity means no motion. Zero acceleration means constant, unchanging motion.
What is another word for zero velocity?
Zero velocity = No acceleration
How is acceleration due to gravity be zero in a parachute?
At terminal velocity (constant velocity), the acceleration is zero, but prior to that, there is a downward acceleration.
Why is the body moving with a uniform velocity is zero?
The body is not zero, but the sum of all forces on it is. -- "Uniform velocity" means no acceleration. -- Acceleration is force/mass . -- If acceleration is zero, that's an indication that force must be zero.
What happens to the velocity if acceleration is zero?
The velocity stays the same, it is constant
When the acceleration of an object is zero what is the velocity at the same time?
As long as acceleration is zero, the object's velocity is constant.
Can you have a zero acceleration but non zero velocity explain it with help of a graph?
Yes, you can. Zero acceleration simply means there is no CHANGE in velocity. It doesn't mean there is no velocity.
