WEBVTT

1
00:00:00.000 --> 00:00:07.488
Here is the problem: A net force of 2800 N acts on a 200 kg car. What is its acceleration?

2
00:00:07.938 --> 00:00:13.987
Use the Newton prime s second law formula, rearranged for the unknown, in SI units.

3
00:00:14.787 --> 00:00:17.666
Formula: Newton prime s second law.

4
00:00:18.116 --> 00:00:20.113
Rearrange for acceleration a.

5
00:00:20.563 --> 00:00:22.537
Substitute the known values.

6
00:00:23.337 --> 00:00:27.900
So the answer is acceleration a equals 14 m/s squared.

7
00:00:28.350 --> 00:00:44.859
Newton prime s second law links the net force on an object to its acceleration: F equals ma. Force and acceleration point the same way, so a negative force gives a negative acceleration. One newton accelerates one kilogram by 1 m/s squared.

8
00:00:45.659 --> 00:00:51.278
Substituted every value back into the formula: both sides agree, which checks out.
