CAPE Physics Unit 1 · 2011 · Paper 1 · Question Q2

Mary is on her way to New York and wants to ensure that her suitcase does NOT exceed the 50\text{ kg} limit. She stands on the scale and finds her mass is 55\text{ kg} \pm 1\text{ kg}. She next lifts her suitcase and the mass changes to 104\text{ kg} \pm 1\text{ kg}. What is the mass of her suitcase?

1. (A)49\text{ kg} \pm 1\text{ kg}
2. (B)49\text{ kg} \pm 2\text{ kg}
3. (C)50\text{ kg} \pm 1\text{ kg}
4. (D)51\text{ kg} \pm 2\text{ kg}