Final answer:
The weight of a mass of 15 kg on Earth is calculated using the formula F = ma, with the acceleration due to gravity being 9.80 m/s², resulting in a weight of 147 N.
Step-by-step explanation:
If you have a mass of 15 kg and want to calculate your weight on Earth, you can use the formula F = ma, where F is the force (weight), m is the mass, and a is the acceleration due to gravity. On Earth, the acceleration due to gravity, g, is 9.80 m/s². Therefore, the weight W is calculated as:
W = mg = (15 kg)(9.80 m/s²) = 147 N.
So, the weight of a mass of 15 kg on Earth is 147 N. This is choice a.