Question

what is meant by positive and negative acceleration? give one example for each.​

Answer 1

$\huge\mathbb{\underline{Answer:-}}$

When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.

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Answer 2

Answer:

When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.

EXAMPLE FOR 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.

EXAMPLE FOR NEGATIVE ACCELERATION:

A car is moving with high velocity (say v1 = 100km/hr toward North) suddenly it's driver notices a dog crossing the road, applies the brake and reduces the velocity of car to zero(v2 = 0) in 10 seconds (t2 - t1 = 10). So v2 -v1 is negative, implies negative acceleration.

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