Question

Define acceleration . what do you mean by positive and negative acceleration ? ​

Answer 1

Acceleration is the rate of change in velocity over time.
Positive Acceleration : accelerate in the direction it is moving (speeds up).
Eg: riding bikes forward harder to speed up.

Negative Acceleration : accelerate in the opposite direction to the movement (slow down).
Eg: riding bike and pushing the brake slows down.

Answer 2

Explanation:

• The rate of change of velocity of an object is called its acceleration. Its formula is given by :

$a=\dfrac{v-u}{t}$

u and v are initial and final velocity respectively

t is time taken

• If the final velocity of an object is more than initial velocity, then its acceleration is positive.

• If the final velocity of an object is less than initial velocity, then its acceleration is negative. It is also called deceleration.

Learn more,

Acceleration

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