An object which experiences either a change in the magnitude or the direction of the velocity vector can be said to be accelerating. This explains why an object moving in a circle at constant speed can be said to accelerate – the direction of the velocity changes.
Can an object be accelerated if it is?
Yes, of course a body can accelerate if it has uniform speed . ... Its speed is uniform but its velocity changes as the direction at each point of the circular path changes. Thus with the change in velocity, there is acceleration as acceleration is the change in velocity with time, its not change in speed with time....
What does it mean for an object to be accelerated?
Acceleration , rate at which velocity changes with time, in terms of both speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down. ... Acceleration is defined as the change in the velocity vector in a time interval, divided by the time interval.
Can an object be accelerating if it is moving with constant speed?
The velocity vector is constant in magnitude but changing in direction. ... For this reason, it can be safely concluded that an object moving in a circle at constant speed is indeed accelerating . It is accelerating because the direction of the velocity vector is changing.
Can an object be accelerated without?
Yes it can . Acceleration is defined as he rate of change of velocity. If the Velocity is constant then there is no acceleration. ... It means that if an object continues to go at the same speed without slowing down or going fast but changes its direction then definitely the velocity changes.
Does a positive acceleration always mean an object is speeding up?
An object with negative acceleration could be speeding up, and an object with positive acceleration could be slowing down . ... If acceleration points in the same direction as the velocity, the object will be speeding up.
Why do objects gain mass as they accelerate?
As an object increases in speed , so does the amount of energy that it has, this energy is what we refer to as ‘the increase in mass’ (just remember, this is inertial mass). ... Since an object has infinite kinetic energy when it approaches the speed of light, it therefore has infinite mass as well.
Can an object have constant speed and still be accelerating give an example?
For example, a car going on a roundabout can have a constant speed but since it will have a constantly changing direction, it can have a varying velocity as velocity is a vector quantity and depends on the direction of the car. Hence, a body can have a constant speed and still be accelerating.
Can a body have uniform speed but still have acceleration?
Answer: An object moving in a circular path with uniform speed, i.e covering equal distance in equal amount of time is still under acceleration . Because, the velocity keeps on changing due to continuous change in the direction of motion.
Can body accelerate without speeding up or slowing down it?
Yes, it is possible for a body to accelerate, without changing the speed . Bodies in circular motion are continuously accelerating. Even if they don’t change their speed, their velocity is constantly changing due to continuous change in direction of motion.
Can a body accelerate without changing speed?
Since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your direction—or change both. If you’re not changing your speed and you’re not changing your direction, then you simply cannot be accelerating —no matter how fast you’re going.
Why is the speed of an object never negative?
The ratio of distance travelled and the time taken by a body can be zero but not negative. Since distance and time are positive quantities and speed is obtained by the ratio of these two quantities , speed cannot be negative.
What does it mean if an object has a positive velocity but a negative acceleration?
An object which moves in the positive direction has a positive velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion (in this case, a negative acceleration).
Which of the following acceleration shows that an object is slowing down?
According to our general principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity . Thus, this object also has a positive acceleration.
Can a ball with zero acceleration speed up?
The answer is no . A particle cannot speed up at zero acceleration because acceleration is equal to change in velocity per unit time.
Does acceleration increase with mass?
As we increase the force on an object the acceleration increases proportionally . Since the mass does not change as the acceleration increases, we can say that force is equal to acceleration. Therefore, if you double the force you double the acceleration. ... Therefore, mass is inversely proportional to acceleration.
