Question

On a planet far, far away, an astronaut picks up a rock. the rock has a mass of 5.10 kg, and on this particular planet its weight is 40.0 n. if the astronaut exerts an upward force of 53.7 n on the rock, what is its acceleration? magnitude

Answer 1

The net force is the difference between upwards force and downwards force, so 53.7N-40N=13.7N=∑F. ∑F=ma, m=5.1kg, so a=13.7N/5.1kg.