- #1
MarcoAurelio
- 10
- 0
I have a question, according to rules for the sign of x and y-acceleration; when I should use the negative sign for gravity (g) in a problem, because it's confusing since I've seen that according to my textbook when an object is free falling g is negative (therefore acceleration is -9.8 ms^-2) but also my teacher said that when we throw an object upwards g is also negative. I'm confused, since I don't know when I should use a negative sign and when a positive sign for acceleration due to gravity.