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Wiki User
Answered 2011-09-04 21:20:43
Yes, it can, if the initial velocity vector of an object was in opposite direction to its
constant acceleration.
Example:
Anything you toss with your hand has constant acceleration after you toss it ...
the acceleration of gravity, directed downward. If you toss it upward, it starts out
with upward velocity, which reverses and eventually becomes downward velocity.
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Related Questions
What do you call it when an objects velocity changes?
A change in an objects velocity is called acceleration. Velocity is defined as an objects speed of travel AND its direction of travel. Acceleration can change only an objects speed, only its direction or both. If there is no acceleration acting on the object, then the velocity remains constant.
How are the direction of the an objects acceleration and direction of the same object change in velocity related?
Acceleration is change in velocity so the direction should be the same
What does newtons first law of motion state about objects at rest and objects in motion?
Without force there is no acceleration and with no acceleration the velocity remains constant. When the constant velocity is zero the object is at rest.
Why is it that objects can accelerate at a constant speed but not at a constant velocity?
If the velocity is constant there is no acceleration. Speed is not velocity, velocity has speed and direction. I A car going around a circular track at 60 mph keeps the same speed but changes direction and thus accelerates at a constant speed. Velocity is speed in a certain direction. So change the speed but keep direction the same and you change the velocity. or Change the direction while keeping the speed the same and you change the velocity. If the speed is constant, any change of direction is a change in velocity. Driving around in a circle is a case of constantly changing direction.
What are two ways in which an object can have constant velocity uniform motion?
Objects moving in uniform circular motion will have a constant speed, and two objects with the same acceleration have a constant velocity.
A cyclist goes around a level circular track at constant speed. Is the cyclist's acceleration zero because her speed is constant?
No. The cyclist is moving at a constant speed, but her velocity is changing. Remember that velocity is speed with a direction vector associated with it. As speed is constant, only direction is changing. But a change in direction is a change in velocity (even if speed is constant), and this requires acceleration in that direction to accomplish the change in direction. You're on the right track, but just recall that acceleration is tied to velocity and not just speed. And note that velocity can change all the time without speed changing. Acceleration must cause the change in velocity. Consider that objects in orbit around the earth move at a pretty constant speed, but accelerate toward the earth all the time. Their speed coupled with their acceleration toward earth cause them to move in an arc - which is their orbital path.
When velocity is positive and acceleration is zero what happens to an objects motion?
When acceleration is zero, then the object is moving in a straight line with constant speed. (That's the effective meaning of constant velocity.)
What would happen to an object in free fall?
The velocity in the x direction would be constant because gravity only affects the vertical components of objects. The velocity in the y direction would increase due to the constant acceleration due to gravity. The acceleration due to gravity on Earth is always -9.81 m/s^2.
How is a car accelerating when it turns?
Acceleration is the rate of change of velocity (how fast velocity changes - dv/dt). You should also remember that acceleration is a vector, meaning that direction matters. If any objects goes around - even at a constant speed - in a curve, its direction is changing, therefore its velocity its changing, therefore it is accelerating.
Both speed and acceleration include the direction of an objects motion true or false?
This is not true. Acceleration includes direction, but speed does not. Speed in a particular direction is called velocity.
What effect does gravity have on the velocity of falling objects?
The magnitude of the velocity increases at a steady rate, but its direction remains constant, pointing toward the center of the Earth. (Wherever the event is taking place, the locals refer to that direction as "down".) Since either the magnitude or the direction of the velocity is changing, the effect can properly be called "acceleration".
Acceleration is a change of speed or?
Acceleration is the change in an ogjects speed or a change in an objects direction of motion or both of these. If instead of speed you use the word velocity , which is both an object's speed and its direction of motion, then you could say "acceleration is the change in an objects velocity" and that would cover all the possibilities in one statement.
What three ways can acceleration change an objects motion?
Acceleration is the change in velocity and/or direction of an object. Acceleration can either speed an object up, slow it down (deceleration), or change the direction in which the object is moving.
Which term explains whether an objects velocity has increased or decreased over time?
You're fishing for "acceleration", but your description doesn't support that answer.Acceleration is also present if the direction of motion has changed, even if the speed(the size of velocity) hasn't changed.Acceleration explains the change in an objects velocity over time.
What happens to an objects accelertion if the force on it increases and the mass remains constant?
The acceleration increases in the direction of the force.
When there is no air resistance objects of different masses fall with what?
They fall at the same velocity because acceleration due to gravity is constant.
An objects acceleration decreases as the objects mass?
force = mass * acceleration then mass and acceleration is inversly proportional. Actually mass is constant but when the speed increases the mass become less since acceleration and velocity is directly propotional thus acceleration increases too.....thx..with best regards..
What does Newtons 1st law of motion state about objects on which forces are balanced?
They will continue to travel at a constant velocity and direction.
What is a objects speed and direction?
velocity, or velocity vector.
Acceleration is how quickly an objects velocity changes?
Yes, acceleration is the how the velocity changes. This also includes when an object turns
What law states that every object maintains constant velocity unless acted on by and unbalanced force?
The law of Conservation of energy, Newton's First law. This law requires the objects acceleration be zero, thus constant velocity.
Can a body have a constant velocity and still be accelerating?
No. Acceleration is defined as the rate of change of velocity. If velocity is constant, then its rate of change is zero. --------------------------------------------------------------------------- Another contributor obfuscated: If we were to get really picky with our vectors we could say that an object could have constant velocity in the x-y plane and still accelerate in the z-axis. Also a system of objects could have a net-velocity in 3-D space and still have a radial acceleration. A solar system traveling through space at constant velocity will have a radial acceleration, for each component part of the system, around the gravitational center of mass of the system.
Why objects accelerate when they change directions?
An acceleration is a change in velocity. Velocity is a vector quantity; it tells you about both an object's speed and its direction of travel (vectors are often represented as arrows; the length of the arrow is the magnitude, here the speed, and it points in the relevant direction). So you can see that a change in either an object's speed or direction counts as a change in velocity, and is therefore an acceleration.
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