Question

Reading Velocity Graphs motion diasrams to each s ons for Y and a Given the following velocity vs. time graphs answer the questions that follow A for a raphs 1D Is graph A speeding up or slowing down? Explain. 2) Is graph B speeding up or slowing down? Explain. Slow: 31 A(s store 3) Is the acceleration of A positive or negative? How about for B? Explain. A:Tes, pos ólope B:nes, nes slope Which graph has a greater magnitude of acceleration (A or B)? They are hoth equal, mesntfude s an oub selote quantit 4) 5) What would a graph for an object that is slowing down look like? Sketch on the graph above using a dashed line. Hint: graph. you may need to make more than one 6) Circle the correct words to complete the following sentence. When velocity and acceleration are in the samelópposite direction you are slowing down and when velocity and acceleration are in the samelopposite direction you are speeding up. 7) Is it possible to have a positive acceleration and a negative velocity? If yes which graph above might correspond to this situation. You can also consider your graphs from 5 acoresponds to this

Answer 1

め SPEED UP

1) For graph A velocity is increasing on increasing the time positive slope. Hence graph A is speeding up.

2) For graph B velocity is still increasing in negative direction on increasing the time (positive slope, remember slope is scalar quantity) . Hence graph B is speeding up.

3) Both cases velocity is increasing on increasing time. Hence there is positive acceleration in both cases.

4) Both has same slope and hence have same magnitude of acceleration.

5) Figure 2 shows such a sketch.

6) Both same/opposite are incorrect. See figure 1 and 2. There are mix up cases of velocity and acceleration for speed up and speed down.

7) Yes possible. B is corresponding to this. See figure 1.