Question

For this velocity-time graph, what is the average acceleration between 60 s and 120 s?

a. +13.6m/s2.
b. +21.5m/s2.
c. +1,700m/s2.
d. +29.4m/s2.

Answer 1

The average acceleration between 60 s and 120 s is +1/3 m/s^2.

Step-by-step explanation:

To find the average acceleration between 60 s and 120 s, we need to find the change in velocity and divide it by the change in time. On the velocity-time graph, we can determine the change in velocity by finding the difference in the y-values at the starting and ending points. In this case, the change in velocity is +30 m/s - (+10 m/s) = +20 m/s. The change in time is 120 s - 60 s = 60 s. Therefore, the average acceleration is +20 m/s divided by 60 s, which simplifies to +1/3 m/s^2.