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An object is accelerating if its speed or direction changes with time. Since speed and direction are the components of velocity, an object is accelerating if its velocity changes with time.

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0Acceleration is the time rate of change of velocity. Velocity is a vector. It has a magnitude ( speed ) and a directio. If either the speed or the direction of motion changes the object is accelerating. Example; an object moving in a circle at constant speed is accelerating because its direction is continually changing.

Acceleration 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.

In that case, the speed changes over time.

Acceleration means that the velocity (NOT necessarily the speed) changes over time.

The object is accelerating or decelerating in the radial direction.

Acceleration is the rate of change of velocity over time, so velocity must always be changing if the object is accelerating. HOWEVER, you said speed which means only magnitude, not direction. If you stay the same speed, but change direction then you are accelerating. Simple answer: when you are going the same speed in a circle - velocity changes, therefore acceleration changes.

The object is accelerating or decelerating in the radial direction.

The same way you change the velocity of any object. If a net force is applied to an object, the object's velocity changes.

When an object speeds up, slows down, or changes direction, it is changing it's velocity, also known as accelerating.This is a common term in mechanical physics. The formula for velocity is D(distance) / T(time) whereas acceleration is the change in velocity which takes time to do making its fomula: D/T^2

The slope of the line of a distance versus time graph is the velocity of the object. If this is a constant, in other words the graph is a straight line, the object is not changing its velocity and so is not accelerating. If the object is accelerating, the velocity of the object will be changing, thus the graph will not be a straight line, but a curve - the amount of curvature (and direction) tells you how much the object is accelerating (and in what direction - velocity and acceleration are vector quantities with both magnitude and direction).

That the object being studied is accelerating in the radial direction.

That is possible, for example, if an object moves around in a circle. In this case, the velocity changes all the time; the speed does not.

If an object's velocity changes over time, it is accelerating.

Yes, since the velocity changes, there is acceleration. Note that the velocity is made up of a speed, and a direction - and in circular motion, the direction changes all the time.Yes, since the velocity changes, there is acceleration. Note that the velocity is made up of a speed, and a direction - and in circular motion, the direction changes all the time.Yes, since the velocity changes, there is acceleration. Note that the velocity is made up of a speed, and a direction - and in circular motion, the direction changes all the time.Yes, since the velocity changes, there is acceleration. Note that the velocity is made up of a speed, and a direction - and in circular motion, the direction changes all the time.

Velocity is change in position, or displacement, over time.

It will have increase in speed with increase in time

Yes. This is exactly the case when an object is thrown on the surface of the Earth. Consider an (American) football thrown in the air. This ball has the force of gravity accelerating it downward, but there is no force acting on it horizontally, thus there is no acceleration horizontally. As a result, since acceleration is the rate of change in velocity, the velocity in the vertical direction is changing, whereas the velocity in the horizontal direction is not.

acceleration is change in velocity over time. It is important to know that speed is not a vector quantity; it is scalar (meaning it does not have direction), -- velocity does. Therefore, speed is only the MAGNITUDE of velocity. Also, acceleration is a vector quantity meaning it has both magnitude and direction. If you change EITHER magnitude or DIRECTION, acceleration changes. Okay anyway to answer your question, You can have the same magnitude of velocity (aka same speed) and still be accelerating if YOU CHANGE DIRECTION. --- gh

Acceleration is the rate of change of the velocity. Accelerating mean the object is increasing the velocity with time.

Velocity is a vector with magnitude (speed) and direction. Since the linear velocity changes direction the speed is constant but the velocity is NOT constant.

if the velocity is positive to start with it changes direction when the velocity is less than zero; that is, when it is negative.

Acceleration is the change in velocity of an object over time. Take note that velocity is a vector quantity which means that it has magnitude and direction...Thus...An object undergoes acceleration when:1. there is a change in the magnitude of the velocity (speed) of an object.2. there is a change in direction of an object.3. it changes both in direction and magnitude.

Let's review some terms before we tackle this one. Speed is displacement per unit of time. We know 60 miles per hour is a speed. Velocity is speed with a direction vector associated with it. We know 60 miles per hour east is velocity. Acceleration is a change in velocity. That means if an object changes its speed or its direction or both, it is accelerating.If an object has a given velocity and it slows down or speeds up, it is accelerated. But if the same object changes direction without a change in speed, it is still experiencing acceleration. A force had to act on the object to change its direction, even though its speed didn't change. Thus, an object can accelerate even though it does not change speed.

Yes, an object having zero average velocity over a given time may still be accelerating during that interval, relative to another object which is accelerating away from it (i.e., an observer on that other object would see the "zero average velocity" object moving away from him/her).

Speed-Versus-Time Graph and Distance-Versus-Time graph are the two types of graphs that can be used to analyze the motion of an accelerating object.

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