Final answer:
Assuming the intended meaning of 'kn/ms' is a typo and it should be 'km/h', the correct SI unit for acceleration is 'm/s²'. After converting km/h to m/s and understanding that acceleration's unit is 'm/s²', the answer is Option A) 1000 m/s².
Step-by-step explanation:
The question requires us to choose the correct SI unit for the expression kn/ms, where 'kn' likely stands for kilonewtons and 'ms' stands for milliseconds. However, as 'kn' is not a standard notation for speed or velocity, and since the context provided suggests dealing with conversions related to speed and acceleration, it is plausible that 'kn' is a typo and should be 'km/h' (kilometers per hour). Therefore, we will proceed under the assumption that the question meant to use 'km/h' instead of 'kn' and 'ms' stands for 'm/s' (meters per second).
Converting Kilometers per Hour to Meters per Second
To convert km/h to m/s, one must multiply by 1000 (to convert kilometers to meters) and then divide by 3600 (to convert hours to seconds), as per the conversion information provided.
Understanding Acceleration
Acceleration is defined as the change in velocity (in m/s) over time (in seconds), and its SI units are m/s². This means that if velocity increases by a certain number of m/s each second, this number will be the acceleration.
SI Unit for Acceleration
According to the provided information and the correct understanding of SI units for acceleration, the answer to the question is given by identifying the unit that represents acceleration, which is m/s². Hence, the correct SI form for kn/ms, assuming the intended meaning was km/h converted to acceleration in m/s², is 1000 m/s². Therefore, the correct option to choose is Option A) 1000 m/s².