Final answer:
To calculate acceleration between two time points, you need the change in velocity during that time. Therefore, if this were the case between t=9s and T=10s, the acceleration would be 10 m/s².
Step-by-step explanation:
To calculate the acceleration between t= 9s and T= 10s, we would need to know the change in velocity (Δv) during this time interval (Δt).
Assuming we have a velocity versus time graph or some additional information regarding the initial and final velocities at t=9s and T=10s, we could use the formula acceleration (a) = Δv / Δt to calculate the acceleration.
For example, if a vehicle accelerates uniformly from an initial velocity of 2 m/s to a final velocity of 10 m/s in 8 seconds, the acceleration can be calculated using the difference in velocity (10 m/s - 2 m/s = 8 m/s) over the time span (8 s), giving us an acceleration of 1 m/s².
Similarly, if an object's velocity increases by 10 m/s every second, it has an acceleration of 10 m/s². This increase occurs for each second, as stated in option (a). Therefore, if this were the case between t=9s and T=10s, the acceleration would be 10 m/s².