Question

Besides the gravitational force, a 2.80 kg object is subjected to one other constant force.
The object starts from rest and in 1.20 s experiences a displacement of (4.20i – 3.30j) m,
where the direction of j is the upward vertical direction. Determine the other force.

Answer 1

you should post you attempt, first

if you are lowering your self into the usage of vectors, then it is hard to do one post that deals with it all.

if you just want a quick answer, you can resolve out of the vectors into x and y coordinates, but then the problem is way less interesting.