What does the positive and negative sign of velocity indicates?

Velocity. A positive velocity simply means that the object is moving in the positive direction, as defined by the coordinate system, while a negative velocity means the object is traveling in the other direction.

What is the sign of an acceleration that reduces the magnitude of a negative velocity of a positive velocity?

What is the sign of an acceleration that reduces the magnitude of a negative velocity? Of a positive velocity? If the magnitude of velocity is decreasing with time then it is called deceleration. The direction of deceleration is always opposite to the direction of velocity.

What does the positive and negative sign of acceleration indicates with respect to velocity?

A positive acceleration means an increase in velocity with time. negative acceleration means the speed reduces with time. its a retardation. If the speed is increasing, the car has positive acceleration.

Is acceleration positive or negative when velocity is zero?

In physics, the sign of an object’s acceleration depends on its direction. If you slow down to a complete stop in a car, for example, and your original velocity was positive and your final velocity was 0, so your acceleration is negative because a positive velocity came down to 0.

What does a negative velocity indicate?

An object which moves in the negative direction has a negative velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion (in this case, a positive acceleration).

What is the negative magnitude of an acceleration?

Negative accelerations do not refer acceleration values that are less than 0. An acceleration of -2 m/s/s is an acceleration with a magnitude of 2 m/s/s that is directed in the negative direction.

Can speed be negative in physics?

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 is positive and negative acceleration examples?

Positive acceleration=​ A bus or car moving with increasing speed has positive acceleration. We can say that it is accelerating with the direction of travel. Negative acceleration=​In the above example, if we apply the break, the speed of the car decreases. Then it has negative acceleration.

When is the acceleration positive and negative?

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).

Is the direction of acceleration same as the direction of velocity?

Acceleration is a vector in the same direction as the change in velocity, Δv. Since velocity is a vector, it can change either in magnitude or in direction. When an object slows down, its acceleration is opposite to the direction of its motion.

Which graph indicates negative acceleration?

velocity-time graph
A velocity-time graph with a negative slope indicates an object is negatively accelerating. A velocity-time graph with a flat line (slope of zero) indicates uniform motion.