Which of the following statements is true?

Question

A Newton is equal to 9.8 m/s 2.
On a level surface, applied force equals weight.
Normal forces occur at perpendicular angles to the surface between two objects.
Action-at-a-distance forces require physical contact between objects.

Answer 1

Hurry

Answer 2

A is false. N = kg-m/s^2
C makes no sense at all
D -- contact means no distance, right?

So, B

Answer 3

Normal forces occur at perpendicular angles to the surface between two objects.
..... True