1. Why can we apply Newton's 2nd Law to circular motion?

Question

1. Why can we apply Newton's 2nd Law to circular motion?
a. because the objects are not accelerating
b. because there is no net force acting on the objects
c. because the net force acts parallel to the motion
d. because the acceleration causes the object to change direction


Choose 1

Answer 1

We have to be able to apply Newton's second law to anything, otherwise it would long have ceased to be what we call a law. If you can come up with something to which any "law" does not apply then you immediately call the law into question. So, you can apply it to circular motion simply because you can apply it anywhere to anything.
However the answer that the person who thoughtlessly formulated this question is seeking, and thinks is "right", is d.

Answer 2

we can apply newtons 2nd low only for a given instance of circular motion. (ie. for delta t time). at a given instance acceleration V^2/r is to the center of the motion. there is no acceleration along the tangent of the motion. So for a given instance we can apply newtons 2nd low for circular motion.
for whole angullar motion, we could use general relatavity.

Answer 3

a = v^2/r F = ma so, F = mv^2/r a = acceleration v = velocity r = radius F = forces a replace in velocity (accordingly, the direction of velocity, not the importance), skill an acceleration, for this reason, a information superhighway pressure is being utilized.

Answer 4

Have you ever considered doing your homework yourself? You'll never learn otherwise.

Answer 5

The answer is C..... Is this for a test or somethin??!

Answer 6

The answer is d.