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The direction of the acceleration is towards the center. The magnitude of the acceleration is v2/r.
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True or false Negative acceleration always means that a system is slowing down?
false A car can have a negative acceleration and be speeding up. A negative acceleration determines the direction of the acceleration A car with forward acceleration will speed up in the forward direction A car moving forward with a negative acceleration will slow down A car not moving with a negative acceleration will speed up in the backward direction A car moving backward with a negative acceleration will speed up in the backward direction
Would a force have to be applied in the same or opposite direction to stop a moving ball?
The opposite direction. To stop a moving object requires an acceleration in the direction opposite its motion.
How can an object slowing down have an acceleration that's not negative?
If the positive direction was defined at the outset as the direction opposite to the direction in which the object happens to be moving just now, and the object is slowing down, then the acceleration is positive because, algebraically, the object's speed is increasing in the positive direction.
Can a body have acceleration without velocity?
Yes. Velocity is speed per unit of time with a direction vector telling you which way the object in question is moving. Acceleration is a change in velocity - in any part of velocity. If something like, say, a rock is in deep space (a zillion light years from anything) and it's moving along unaffected by any gravity or other forces, it has some velocity (some speed in a given direction, or is moving at some distance per unit of time in a given direction), but it isn't changing speed or direction. If something is moving without changing its speed or its direction (either of which requires a force to act on the object - to accelerate the object), it has zero acceleration. Such an object is said to have a constant velocity and will have zero acceleration. Certainly if an object is not moving, it has zero velocity and zero acceleration, but that's probably not what is being asked. It has velocity (zero) and no acceleration. To recap, an object can have a non-zero velocity and zero acceleration.
How could an object accelerate while still traveling at a constant speed?
Acceleration means the velocity changes. Velocity is made up of speed and a direction, so if only the direction changes, the velocity still changes, and therefore there is acceleration. The typical example is moving around in a circle.
What force keeps an object moving in a circle. in what direction does this force act?
The Centripetal force keeps a object moving in a circle and its force and acceleration are directed toward the center of the circle
If an object is moving in a circle with a constant speed Its acceleration is constant in what?
It is constant in magnitude. It is changing in direction.
Does the acceleration of a body moving in circular path remain constant?
If the speed of the object doesn't change, then yes.
What is the Direction of Acceleration of an object moving on any circular path at constant speed is pointed?
In toward the center of the circle.
What will be acceleration of a car moving in a circular motion with constant speed.?
If body is moving in a circle with uniform or constant speed its acceleration will be uniform as velocity i.e. to say direction is changing at every point.
What is to change direction?
acceleration in a direction that is not parallel to the direction you are moving
What is Changed direction?
acceleration in a direction that is not parallel to the direction you are moving
Which describe acceleration involving only a change in directions?
This type of acceleration occurs when an object is moving around a circle at a constant speed. As the object moves around the circle, the direction of its velocity is constantly changing. This type of acceleration is called centripetal acceleration. The direction of the acceleration is toward the center of the circle. I hope this answers your question. A car traveling 25 MPH turns 30-degrees to the left without losing speed -- it has accelerated.
Why is traveling in a circle at constant speed called acceleration?
Traveling in any direction, but moving is acceleration. if a particle moves in a circle and comes to the initial position, then the velocity would be zero. acceleration is a scalar quantity and not a vector quantity. answered by K.Sreram from India
He constant acceleration of an object moving in a circle is called?
centripetal acceleration
Is An object moving with a certain direction with an acceleration in the perpendicular direction?
There can be.
Why does centripetal acceleration occur?
Centripetal means towards the center. Any object moving around in a circle is accelerating towards the center. Remember that acceleration involves a change in velocity, and a specification of "velocity" includes the direction; therefore, since the direction of the movement changes continuously, the object is "accelerating", according to the definition of acceleration.
