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Yes. Velocity is rate (or speed) in a given direction. If you change your direction but not your rate (or speed) then you have changed your velocity without changing speed.

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0Velocity is a vector. A vector has a magnitude and a direction. The scalar or magnitude portion of velocity is speed. Velocity is a constant only when both the speed and direction are not varying. Hence, when the speed is changing, the velocity cannot be a constant.

Yes, if you are going in a circle or otherwise changing direction.

No, in order for the velocity to be constant, the speed has to be constant. Speed is a scalar, meaning that it is just a number. (A car goes 50 miles per hour). Velocity is a vector, which indicates that it needs a measure of its displacement and a direction. (A car is going 50 mph to the east). A body can have a constant speed but a changing velocity because the direction can change while the speed is constant. (A car goes 50 mph around a roundabout). However, a body can not have a constant velocity with a changing speed. A car can not be slowing down yet still be going the same speed and direction.

The velocity can still change, even if the speed doesn't. This is because velocity is a vector - not only the magnitude is important, but also the direction.

It means they stay still, or they move at constant velocity.It means they stay still, or they move at constant velocity.It means they stay still, or they move at constant velocity.It means they stay still, or they move at constant velocity.

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.

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.

Acceleration is the rate of change of velocity (not speed). Acceleration is the rate of change of velocity over time. Velocity is defined by speed and direction. A satellite orbiting the earth at a constant speed is still accelerating because gravity is making it travel in a circle (or ellipse) and consequently its direction and therefore its velocity is constantly changing.

Speed is measured in m/s. Velocity is measured in m/s IN A SPECIFIC DIRECTION. You may be driving at 4 mph north, or at 5 mph at 330˚, and your velocity in the northern direction will still be 4 mph. In this example, your speed is different, but your velocity is the same. Thus even if speed remains constant, but its direction changes, your velocity will be different.

yes, as in the case of a satellite orbiting the earth; it is moving with constant speed but not constant velocity as its direction is always changing as it orbits. The net force is provided by gravity accelerating it inward and preventing into from flying away into space

Velocity is a vector quantity, meaning it has a size and a direction.The size is what we call "speed".But a change in direction only is still a change in the velocity.Any change in velocity ... even if only a change in direction ... is called "acceleration".

Yes, unlike velocity which is a vector and has both magnitude and direction, speed is a scalar and lacks a fixed direction. Therefore you can have constant speed in a circular motion and a centrally directed acceleration which is equal too a=v2/r where v in this case would be speed not velocity. Any body that is constantly changing direction can have constant speed while being accelerated. The change in direction need not by circular, or uniform in any way.

If an object was in a circular orbit under the influence of some centralizing force, such as gravity, or magnetism, or electro-static, or even strong nuclear or weak nuclear - then it has a constant speed (not velocity, angular velocity) and a radial acceleration equal to v2/r.

Acceleration 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.

The slope of [distance vs. time] is [speed]. If the slope is constant, then the speed is constant,meaning the magnitude of acceleration is zero.(The direction of velocity might still be changing though, which wouldn't show up on the graph.)

No. A velocity indicates a speed and direction. An acceleration is a change in speed or direction.

Either it is going in a straight line at a constant velocity or it is standing still (constant velocity of 0).

A ball rolling at a constant speed at the same rate of speed on a still surface.

No. Average velocity is still a velocity.Distance is a product of (a velocity or speed) times (a length of time).

it depends on what you mean. velocity is a vector-it has a value (i.e. 5m/s) and a direction on 2d space. so when it is constant, none of these change, neither the value nor the diercition. however, the value of velocity may remain constant, while it's direction changes. in that case it is not correct to call the velocity constant, since the direction changes. if an object moves around a cetre point in circulart motion without it's speed value changing (let's say it's 10m/s), velocity IS changing, since it's direction is changing. we know that the only means of this happening is through the appliance of a force. this particular force in this example has direction towards the centre, and it's value is (m*u^2)/r, where m is the mass, u the value of speed and r the radius of the orbit. when we refer to vectors in fysics, especially newtonian, we generaly refer to their value, since the direction in most cases remains constant. you can see this is not always the case

The air resistance will increase to the point where it counters the downward acceleration.

"Uniform motion" means constant velocity (constant speed in a straight line). Its distance/time graph is a straight line, with any finite slope. "Non-uniform motion" means motion with changing velocity ... speed or direction ... that is, accelerated motion. If the speed is changing, then the distance/time graph must always be rising but can't be a straight line. If the direction is changing but the speed is constant, then the distance/time graph is still a straight line. Distance/time graphs can show speed, but they can't completely display velocity.

Yes an object can be accelerate if its moving along a curve path because when the object moves along a curve path it has constant speed and there is still change in velocity and change in velocity has acceleration

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.

Speed and velocity. Speed is when you travel in a straight line, whereas velocity is when there is a change of direction. There is of cause acceleration which is an increase in speed, but even so the above two still apply.

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