# Practice – Concept builder questions

Questions :

I am slowing down with negative acceleration. Which direction I am moving to?

I am slowing down with positive acceleration. Which direction I am moving to?

I am speeding up with negative acceleration. Which direction I am moving to?

I am moving with zero acceleration. Which direction I am moving to?

I have started moving with a positive acceleration and then my acceleration changed to negative. Describe 2 scenarios for this motion.

Explanations :

I am slowing down with negative acceleration. Which direction I am moving to?

I am moving in the positive direction with decreasing velocity. When acceleration and velocity have opposite signs, it means slowing down – deceleration.

I am slowing down with positive acceleration. Which direction I am moving to?

I am moving in the negative direction with decreasing velocity. When acceleration and velocity have opposite signs, it means slowing down – deceleration.

I am speeding up with negative acceleration. Which direction I am moving to?

I am moving in the negative direction with increasing velocity. When acceleration and velocity have the same signs, it means speeding up.

I am moving with zero acceleration. Which direction I am moving to?

I am moving with constant velocity in either positive or negative direction. If my velocity is not changing my acceleration will always be zero.

I have started moving with a positive acceleration and then my acceleration changed to negative. Describe 2 scenarios for this motion.

Scenario 1: I started moving in a positive direction with increasing velocity and hence my acceleration is positive. Then I slowed down in the positive direction and my acceleration becomes negative.

Scenario 2: I started moving in a negative direction with decreasing velocity and hence my acceleration is positive. Then I sped up in the negative direction and my acceleration becomes negative.

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