A 25-kg crate is pushed across a frictionless horizontal floor with a force of 20 N, directed 20◦ below the horizontal. The acceleration of the crate is:
We are looking solely for the horizontal component of force here.
So let's take cos 20 * 20N
.94 * 20 = 18.8 N
a = F / m
18.8 N / 25 kg = .75