Final answer:
The tension in string 1 when the mass M is 6.0 kg can be calculated using the formula T = M × g, leading to a tension of 58.8 N. However, this answer does not match any of the provided options, indicating that additional context might be necessary to provide a precise response.
Step-by-step explanation:
To determine the tension in string 1 when the mass M is 6.0 kg, we must assume the system is in a state of equilibrium or in uniform motion, since no specific acceleration or additional forces are mentioned. The tension in the string will simply be the force due to the weight of the mass, which is the product of the mass (M) and the acceleration due to gravity (g, which is approximately 9.8 m/s² on Earth).
The tension (T) can be calculated using the formula:
T = M × g
By substituting M with 6.0 kg and g with 9.8 m/s², we get:
T = 6.0 kg × 9.8 m/s²
T = 58.8 N
However, since there are no options that match '58.8 N' and due to the nature of the provided question, it seems as if the information might be insufficient or that the question might be part of a larger problem that has not been provided in its entirety. Without the full context or diagram, it is challenging to give an accurate answer.