Hey guys, I'm confused about this problem - On a planet far, far away, an astronaut picks up a rock. The rock has a mass of 5.80 kg, and on this particular planet its weight is 40.0 N. If the astronaut exerts an upward force of 43.3 N on the rock, what is its acceleration? I thought you just did a=1/m*Fnet. The mass is 5.8, and I thought Fnet would be 43.3n+40N but my answer is not coming out right. If anyone could help me out I'd really appreciate it!