part one:
a force f~ = fx ˆı + fy ˆ acts on a particle that

undergoes a displacement of ~s = sx ˆı + sy ˆ

where fx = 1 n, fy = −4 n, sx = 1 m, and

sy = 2 m.

find the work done by the force on the

particle.

answer in units of j.

part two:
find the angle between f~ and ~s.
answer in units of ◦