How much force is necessasy to accelerate a 1.04 kg hockey puck at 987 m/s/s
(somehow this question is confusing, ,

Newton's second law of motion:

                                                 Force = (mass) x (acceleration)

Put in the numbers you know:  Force = (1.04 kg) x (987 m/s²)

Do the arithmetic:                     Force = 1,026.5 newtons

What was confusing about that ?

I agree that these numbers are ridiculous . . . a force of about 230 pounds,
which no hockey player can muster, even with the mechanical advantage
of his stick, to give a little hockey puck an acceleration of about 100 'G's,
which would totally annihilate the poor puck.  But that's how it works out
with the numbers given in the question.

During the 1800s. hope this !