WEBVTT

1
00:00:00.000 --> 00:00:07.999
Here is the problem: A net force of 1650 N acts on a 200 kg car. What is its acceleration?

2
00:00:08.449 --> 00:00:14.788
Use the Newton prime s second law formula, rearranged for the unknown, in SI units.

3
00:00:15.588 --> 00:00:18.514
Formula: Newton prime s second law.

4
00:00:18.964 --> 00:00:20.984
Rearrange for acceleration a.

5
00:00:21.434 --> 00:00:23.431
Substitute the known values.

6
00:00:24.231 --> 00:00:29.897
So the answer is acceleration a equals 8.25 m/s squared.

7
00:00:30.347 --> 00:00:46.984
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
00:00:47.784 --> 00:00:53.601
Substituted every value back into the formula: both sides agree, which checks out.