What is the force needed to accelerate a 2.0kg ball at 3.0ms^-2
a) In a frictionless horizontal surface, near the surface of the Earth
b) Vertically upward, near surface of the Earth
The Attempt at a Solution
For a) F=2(3) = 6N
By inputing the variables into the formula, I got to an answer. but, I do not know how a) differs from b), as in what route to do for b...
Thank you for any help. :-)