By the help of newtons law of gravitation we can derive keplers third law of planetary motion.
You said T = mg + ma
Subtract mg
from each side: T - mg = ma
Divide each side by m : a = (T-mg) / m
or a = T/m - g
Bar magnets have 2 poles. I think. Answer: first choice
Answer:
75 miles an hour
I hope this is correct and helps
