WEBVTT

1
00:00:00.000 --> 00:00:07.895
Here is the problem: What is the weight of a 5 kg object on Earth (g equals 9.81 m/s squared)?

2
00:00:08.345 --> 00:00:12.525
Use the weight formula, rearranged for the unknown, in SI units.

3
00:00:13.325 --> 00:00:14.556
Formula: weight.

4
00:00:15.006 --> 00:00:16.980
Substitute the known values.

5
00:00:17.780 --> 00:00:22.563
So the answer is weight W equals 49.05 N.

6
00:00:23.013 --> 00:00:42.181
Weight is the gravitational force on a mass: W equals mg, with g approximately 9.81 m/s squared near Earth prime s surface (1.62 m/s squared on the Moon). Mass in kilograms does not change from place to place; weight in newtons does.

7
00:00:42.981 --> 00:00:48.647
Substituted every value back into the formula: both sides agree, which checks out.