00:01
So in this question, we're told that we have a satellite and it's orbiting the earth.
00:09
So here's our satellite.
00:11
And the mass of the satellite is 500 kilograms.
00:18
And the mass of the earth is 6 times 10 to the 24 kilograms.
00:28
The radius of the orbit is 7 times 10 to the 6 meters.
00:40
And we're also going to need the fact that g, newton's constant, is 6 .67 times 10.
00:49
Let me just check that exponent 10 to the minus 11, newton's meters squared kilograms to the minus 2.
01:07
Okay, so first of all, we want to find out what does the satellite weigh? and what the satellite weighs is the force of gravity on that satellite.
01:20
So first of all, the weight of the satellite is g, m, mass of earth, mass of the satellite, divided by r squared.
01:33
So we're just going to put these numbers in.
01:36
So 6 .67 times 10 to the minus 11 times 6 times 10 to the 24 times 500 and then divide.
01:47
By 7 times 10 to the 6 squared.
01:57
And this gives us 4 ,000 80 newtons...