Explanation:
I see an object that is has a Positve acceleration for 4 seconds then a constant acceleration for the final 6 seconds.
ii. Acceleration is the slope of a velocity versus time graph.
Since the first phase is a line, it has a uniform slope.
So we need to chose two points to find the acceleration
Let's use (2,60) and (4,90).
So the acceleration is 15.
This means, for any velocity versus time graph, the velocity is
This is velocity final- velocity initial divided by time equals Acceleration
iii. The average velocity is the the sum of the final velocity and initial velocity divided by 2.
So the average velocity is
Then to find distance
So during the first interval, the motorbike travels
In the next part, the average velocity stays at 90 and this occurs for 6 seconds
Next, we add the velocities
So the distance travleed is 780 meters which is close to 800