Question

If we use plus and minus signs to indicate the directions of velocity and acceleration in one dimension, in which of the following situations does the object speed up?

Answer 1

Answer:

It speeds in plus sign so old follow me

Answer 2

If  plus and minus signs is used to indicate the directions of velocity and acceleration in one dimension, then the object will speed up in the following situation:

(a) Negative velocity and Negative acceleration

• Case 1: When the direction of initial velocity and direction of acceleration is positive.

    ⇒    v  =  u  +  at

• Case 2: When the direction of initial velocity and direction of acceleration is negative.

    ⇒   v   =   − u   − a t

• Therefore, at negative acceleration and negative velocity, the speed of the object will be greater.