Question

If i have an object (with a mass of 100 grams) that needs to go upwards at 0.22m/s for 400m and gravity is 9.8m/s/s. what force do you think i would need to accomplish this?

Answer 1

Since the object goes upwards at constant velocity, by second Newton's law,
\[F-mg=ma=0\Rightarrow F=mg\] with F the force needed to raise the mass. So the force F should be equatl to the weight of the mass.
\[F=0.1\cdot9.8=0.98\ N\]

Answer 2

how did you get F-mg = ma ?