The acceleration between t=9 s and t=10 s is 2 m/s². Therefore, option d is correct answer.
To calculate acceleration, we use the following formula:
acceleration = (change in velocity) / (change in time)
In this case, the change in velocity is 2 m/s, and the change in time is 1 s. Therefore, the acceleration is:
acceleration = 2 m/s / 1 s = 2 m/s²
Calculations:
- Change in velocity = v(10 s) - v(9 s) = 61 m/s - 59 m/s = 2 m/s
- Change in time = t(10 s) - t(9 s) = 10 s - 9 s = 1 s
- Acceleration = (change in velocity) / (change in time) = 2 m/s / 1 s = 2 m/s²
Therefore, option d is correct answer, the acceleration between t=9 s and t=10 s is 2 m/s².