# Physics

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A ball is rolling on a track with an intial velocity of 2.0m/s, E. If the acceleration is 1.5 m/s2, write a sentence that describes the ball's motion, i.e, what does the ball do each second?

• Physics -

I will be happy to critique your thinking.

• Physics -

If I calculate the time, I get 1.3seconds. I assumed the ball is moving changes its velocity every 1.3 seconds?

• Physics -

Your statement does not answer what you have been told to describe: What is the ball doing each second? What did Galelio find?

• Physics -

It's moving 2 meters every second.

• Physics -

no. If it were moving 2 meters every second, it would be moving with constant velocity of 2m/s, with zero acceleration.

Acceleration of 2m/s^2 means

(2m/s)/each second

That is, it increases its velocity by 2 m/s each second.
2,4,6,8, ...

• Physics -

Oh I see. What does that have to do with Galileo? I know about his objects with different masses don't determine which will fall first. Is there another concept?

• Physics -

Galileo first discovered that gravity accelerated objects, and all were accelerated at the same rate. He postulated by geometric arguments that acceleration was a constant increase in velocity.

• Physics -

Thank You.

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