As long as your speed hasn't changed, you are not accelerating.
Yes; acceleration is any change in velocity - speed, or direction.
Velocity is a quantity that has magnitude and direction. The magnitude of velocity is what we call "speed".If the velocity is constant, then its magnitude and direction are both constant.Constant magnitude means constant speed.So the answer to the question is "Yes".
The parachutist and the snowflakes do not fall with a constantly accelerating motion because the velocity changes.
Velocity consists of a speed and a direction. If any of the two changes, the velocity changes.
Yes, it can. Perhaps the simplest example is when an object moves at constant speed, in a circle. In this case, the speed doesn't change; the velocity does.
anything.... since speed and/or direction are changing (and not necessarily at a constant rate), the graph can look like pretty much anything
Acceleration is change in velocity. These are vectors that have magnitude and direction. Changing either magnitude (speed) or direction will have the skater be accelerating. SO, if the skater is going at a constant speed of 2m/s in a straight line, he is not accelerating. If he is at a constant speed of 2m/s traveling in a circle (you gave the word "around"), he is accelerating. Going around in circles means there is a force constantly changing your direction. Obviously that force is coming from the skaters legs.
An accelerating universe is a theory which describes and seeks to explain the increasing rate of the expansion of the universe.
An accelerating universe is a theory which describes and seeks to explain the increasing rate of the expansion of the universe.
Velocity is a quantity that has magnitude and direction. The magnitude of velocity is what we call "speed".If the velocity is constant, then its magnitude and direction are both constant.Constant magnitude means constant speed.So the answer to the question is "Yes".
Velocity 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.
Your body cannot sense constant velocity. For example, you cannot sense that the earth is turning nor can you sense that the earth is orbiting around the sun. And, if you are in a vehicle that is traveling with a constant velocity, you cannot sense that you are moving unless your eyes sense a change in position.
Using brakes slows your speed.
The parachutist and the snowflakes do not fall with a constantly accelerating motion because the velocity changes.
Velocity consists of a speed and a direction. If any of the two changes, the velocity changes.
No the two buses do not have equal velocities because VELOCITY is the SPEED in a given DIRECTION. One would have a velocity of +30m/s because it is traveling in one direction, and the other would have a velocity of -30m/s because it is traveling in the opposite direction.
In contrast, for an ellipse it is the ''sum'' of these distances that is a constant
Yes, it can. Perhaps the simplest example is when an object moves at constant speed, in a circle. In this case, the speed doesn't change; the velocity does.