Answer:
The net force should be of a magnitude of 64 N
Explanation:
We use Newton's second Law for this:

which for our case gives:

There are three answers, the impulse is equal to the change in momentum of the system. The dimensions of these quantities are the same, namely mass times velocity. You can think of impulse as kind of the "net effect" that a force has in changing the state of motion of a system.
Answer:
D) it explodes as a super nova
Explanation:
Answer:
v = 1.16 m/s
Explanation:
As per work energy theorem we know that work done by all forces on the sphere is equal to the change in kinetic energy of the sphere
So here we will have

here we know that

k = 8 N/m
now we have



There may be an esoteric technical shade or nuance of difference. But I've been an electrical engineer for 40 years now, and have always used them interchangeably.
(I would have answered your question by saying "No.", but this website won't accept an answer that's less than 200 characters long.)