E-Scooter Kinematics Part 2 - Moving with Acceleration
Watch the video, and answer the questions below.
Watch Aniq on scooter (slow) vs Jovan running: Acceleration from rest (0:11 to 1:39).
Jovan starts accelerating at the 16 second point onwards. On the distance-time graph, how would you describe the path of Jovan's red line? *
1 point
After Aniq passes Jovan, at what second does Jovan's position match Aniq again? *
1 point
At which second is Jovan's speed the same as Aniq? *
1 point
Now, watch Aniq on scooter (fast) vs Jovan running: Acceleration from rest (1:40 to 2:57).
The gradient of the speed-time graph is the acceleration. You can also get the average acceleration from the formula a=(v-u)/t.
Using the speed-time graph ONLY (middle graph), estimate the average acceleration of Jovan (blue line) from 1 s to 5 s. *
1 point
Using the speed-time graph ONLY (middle graph), estimate the average acceleration of Jovan (blue line) from 5 s to 10 s. *
1 point
The distance travelled is the area under the speed-time graph.
Using the speed-time graph ONLY, calculate the distance travelled by Aniq (red line) from t = 6 s to t = 10 s. *
1 point
Using the speed-time graph ONLY, calculate the distance travelled by Jovan (blue line) from t = 6 s to t = 10 s. *
1 point
Now, watch Aniq on scooter (uniform acceleration) vs Jovan running (non-uniform acceleration (2:59 onwards).
Referring to the acceleration-time graph, at what time does Jovan's acceleration (blue line) reach its maximum? *
1 point
Compare this timing with the speed-time graph for Jovan (blue line). What do you notice? *
1 point
(Jovan's blue line graphs) From 0 to 8 seconds, Jovan's speed is increasing, and his acceleration is increasing as well. This means that Jovan is getting faster as time passes, and the rate at which he gets faster is also increasing as time passes. How would you describe this in summary? *
1 point
(Jovan's blue line graphs) From 8 to 20 seconds, Jovan's speed is increasing, but his acceleration is decreasing. This means that Jovan is still getting faster as time passes, but the rate at which he gets faster is reducing as time passes. How would you describe this in summary? *
1 point