Answer:
(a) W = 882 N
(b) m = 90 kg
(c) Wm = 342 N
Explanation:
(a)
The weight of n object on the surface of earth is given as:
W = mg
where,
W = Weight of Astronaut on Earth = ?
m = mass of astronaut = 90 kg
g = acceleration due to gravity on surface of earth = 9.8 m/s²
Therefore,
W = (90 kg)(9.8 m/s²)
W = 882 N
(b)
Mass of a body is a universal constant. The mass of the body remains same any where in the universe. Therefore, on mars the mass of astronaut will be:
m = 90 kg
(c)
The weight of an object on the surface of Mars is given as:
Wm = m(gm)
where,
Wm = Weight of Astronaut on Mars = ?
m = mass of astronaut = 90 kg
gm = acceleration due to gravity on surface of Mars = 3.8 m/s²
Therefore,
Wm = (90 kg)(3.8 m/s²)
Wm = 342 N
