Why is acceleration negative when velocity is negative?

An object which moves in the negative direction has a negative velocity. If the object is speeding up then its acceleration vector is directed in the same direction as its motion (in this case, a negative acceleration).

Can the velocity be positive when acceleration is negative?

A negative acceleration means that the change in the velocity points in the negative direction. For example, the velocity could be in the positive direction and the object slowing down or the velocity could be in the negative direction and the object speeding up.

Why is acceleration going up negative?

When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object also has a negative acceleration.

Can the velocity of an object be negative when its acceleration is positive give one example?

Yes, the velocity of an object can be negative when its acceleration is positive and vice versa. An example of such a situation is when an object is launched vertically upwards and moves freely under the action of gravity.

Does positive velocity mean positive acceleration?

An object which moves in the positive direction has a positive velocity. If the object is speeding up, then its acceleration vector is directed in the same direction as its motion (in this case, a positive acceleration). The dot diagram shows that each consecutive dot is not the same distance apart (changing velocity).

Can acceleration be positive when velocity is zero?

The principle is that the slope of the line on a velocity-time graph reveals useful information about the acceleration of the object. If the acceleration is zero, then the slope is zero (i.e., a horizontal line). If the acceleration is positive, then the slope is positive (i.e., an upward sloping line).

What happens to the acceleration when the velocity is zero?

Here, accelerations deals with the rate of change in velocity, which means you need the change in velocity . In case, if the question means that if the velocity is always 0 then, the acceleration is always zero. But if the final velocity is zero then the acceleration is negative i.e deceleration.