Under which of the following conditions is Newton's 2nd Law the same as Newton's 1st Law?

Question

A) When the object is speeding up

B) When the object is slowing down

C) When the object has a constant speed

D) None of the above

Answer 1

Newton's 1st law is the same as Newton's 2nd law when F=0, because we know that mass isn't zero, which means that the acceleration has to be zero.

Therefore, C is the correct option.