@Abhisar
An astronaut has weight W on Earth. The astronaut travels to a planet that has a mass 8 times greater than Earth's mass, and its radius is 2 times greater than Earth's radius. What is the astronaut's weight on the planet?

4W
W
2W
0.5W

Question

@Abhisar 
An astronaut has weight W on Earth. The astronaut travels to a planet that has a mass 8 times greater than Earth's mass, and its radius is 2 times greater than Earth's radius. What is the astronaut's weight on the planet? 
  
 4W 
 W 
 2W 
 0.5W

abhisar · Answer

What formula should we use here ?

akohl · Answer

All I can think of is w=mg

abhisar · Answer

$\large\sf F_g=\frac{GMm}{r^2}$

akohl · Answer

Is it 2w bc u multiply the top by 8 and divided by2^2 this multiplied by the bottom/radius and 8/4=2

abhisar · Answer

$\huge\checkmark$