The weight of an object is given by:
[tex]W=mg[/tex]
where m is the mass and g is the gravitational acceleration.
Miguel's mass is the same on every planet (m=60 kg), the only element changing in the formula is g, the value of the gravitational acceleration, which is different for every planet. So by knowing the ratio [tex]\frac{g_x}{g}[/tex], where g is the gravitational acceleration on Earth and [tex]g_x[/tex] is the value of the gravitational acceleration on the planet we are studying, we can calculate the ratio [tex]\frac{W_x}{W}[/tex], where W is Miguel's weight on Earth (which we know, it is W=132 lbs), and Wx is the weight on the planet we are studying:
[tex]\frac{W_x}{W}=\frac{mg_x}{mg}=\frac{g_x}{g}[/tex]
- For the Moon, we have [tex]\frac{W_x}{W}= \frac{g_x}{g}=0.17[/tex]
so the weight on the Moon is
[tex]W_x =0.17 W=(0.17)(132 lbs)=22.4 lbs[/tex]
- For Neptune, we have [tex]\frac{W_x}{W}= \frac{g_x}{g}=1.1[/tex]
so the weight on Neptune is
[tex]W_x =1.1 W=(1.1)(132 lbs)=145.2 lbs[/tex]
- For Mercury, we have [tex]\frac{W_x}{W}= \frac{g_x}{g}=0.38[/tex]
so the weight on Mercury is
[tex]W_x =0.38 W=(0.38)(132 lbs)=50.2 lbs[/tex]