Final answer:
Without additional context or a diagram, it is not possible to identify the correct tension in string 1 with a mass of 1.1 kg. The simple calculation using T = mg gives a value not matching the options provided, indicating more information is needed.
Step-by-step explanation:
To determine the tension in string 1 when the mass M is equal to 1.1 kg, we would need to use the formula T = mg, where T is the tension in the string, m is the mass, and g is the acceleration due to gravity (approximately 9.8 m/s² on Earth's surface). Without additional context or a diagram, it is impossible to provide the specific answer to which of the options listed correctly represents the tension in string 1 with a mass of 1.1 kg. Even though the formula directly suggests T = 1.1 kg * 9.8 m/s² = 10.78 N, this would not match any of the options provided, suggesting that there might be additional forces or considerations at play in the actual scenario that are not included in the given problem statement.