Question

What is the weight of 76kg astronaut on earth? What is the weight of the astronaut on the moon ( g = 1.67 m/s ^2)? What is the weight of the astronaut on mars (g= 3.6 m/s ^2)?

Answer 1

What is the weight of 76kg astronaut on earth? What is the weight of the astronaut on the moon (g = 1.67 m/s ^2)? What is the weight of the astronaut on mars (g= 3.6 m/s ^2)?

Solution.

$m=76kg,g_{Earth}=9.8\frac{m}{s^{2}},g_{Moon}=1.67\frac{m}{s^{2}},g_{Mars}=3.6\frac{m}{s^{2}};$

$F_{Earth}-?F_{Moon}-?F_{Mars}-?$

The weight of astronaut on Earth:

$F_{Earth}=mg_{Earth};$

$F_{Earth}=76kg\cdot 9.8\frac{m}{s^{2}}=744.8N.$

The weight of astronaut on Moon:

$F_{Moon}=mg_{Moon};$

$F_{Moon}=76kg\cdot 1.67\frac{m}{s^{2}}=130.26N.$

The weight of astronaut on Mars:

$F_{Mars}=mg_{Mars};$

$F_{Mars}=76kg\cdot 3.6\frac{m}{s^{2}}=273.6N.$

Answer:

The weight of astronaut on Earth is $F_{Earth}=744.8N$.

The weight of astronaut on Moon is $F_{Moon}=130.26N$.

The weight of astronaut on Mars is $F_{Mars}=273.6N$.