Topic: Four steps of problem solving
July 20, 2019 / By Brandt Question:
A 1440 N football player, who missed a tackle in a very important high school game, is sent by his coach on a spaceship to a distance of four earth radii from the centre of the earth. What will the force of gravity on him be at that altitude?
PLEASE WRITE STEPS TOO! THANK YOU VERY MUCH!
Adolph | 9 days ago
First M1=Mass of Football Dude = F/g = 1440/9.8
F = G (M1*M2)/r^2
F= G (Mass of Football Dude * Mass of Earth)/r^2
Hmmm ... trick Q
Radius of the Earth: approx 2000km (?)
Four times the radii: 4 x 2000 = 8000km
Conclusion: being 6000km from the surface of the Earth = 0 gravity.