Question

your acceleration was in the positive or negative direction. You may have to adjust the axes to see the needed features. Once you get a good graph, study it until you can answer this question: Acceleration graphs are typically "noisy," but you have to at least be able to tell What was the sign of the acceleration while you were speeding up while moving away? Use the definition of acceleration to show how you arrived at this answer Explain why this makes sense, using the definition of acceleration. What was the sign of the acceleration while vou were slowing down while moving away? Again, explain why this makes sense, using the definition of acceleration. Prediction: What will be the direction of the acceleration if you move toward the motion detector and speed up? Settle this question with your lab partners, and then write down your group decision here. Don't try it until you write down a prediction! Now try it. Was your prediction right? If not, how do you need to change your reasoning

Answer 1

Ans :

1 - If the object is speeding up, the sign of acceleration = the sign of velocity.

The acceleration is positive because of the velocity and speeding up results in a positive sign.

2 -If the object is slowing down, the sign of acceleration is the opposite of the sign of velocity.

If you are slowing down, the direction of your acceleration and your velocity are the opposite. so your acceleration is negative.

3 - The acceleration in the graph is negative. In our experiment, the object was moving toward the detector, which was our origin and speeding up. Since the velocity was increasing in the negative direction, the rate of change of velocity (the slope of its graph) was negative. Acceleration = the rate of change of velocity.

4. A prediction was correct.