1) an astronaut has 80 kg mass on earth
(a)what is his weight on earth?
(b)what will be his mass and weight on mars where g=3.7 m/s square
2)a certain particle has a weight of 30N at a place where the acceleration due to gravity is 9.8 m/s square
(a) what are its mass and weight at a place where acceleration due to gravity is 3.5 m/s square
(b)what are its mass and weight at a place where acceleration due to gravity is 0