Answer
670 N, 120 N, 250 N, 0 N.
Work Step by Step
In all cases, the weight is mg, where g is the local acceleration due to gravity. Answers are rounded to 2 significant figures.
a. $$W_{Earth}=mg=(68 kg)(9.8 \frac{m}{s^{2}}) \approx 670 N$$
b. $$W_{moon}=mg=(68 kg)(1.7 \frac{m}{s^{2}}) \approx 120 N$$
c. $$W_{Mars}=mg=(68 kg)(3.7 \frac{m}{s^{2}}) \approx 250 N$$
d. $$W_{space}=mg=(68 kg)(0 \frac{m}{s^{2}}) = 0 N$$
