On the surface of the moon, the astronauts weight is 128 newtons. What is the moon's gravitational constant?

no way to tell

what is his mass?
what is his weight on earth?

something, eh?

The Moon's gravitational constant can be calculated using the formula:

g = w / m,

where g is the gravitational constant, w is the weight of the astronaut, and m is the astronaut's mass.

In this case, the weight of the astronaut is given as 128 newtons. However, we need the mass of the astronaut to proceed further. If you provide the mass of the astronaut, I can calculate the Moon's gravitational constant for you.

To find the moon's gravitational constant, we need to use the formula for gravitational force:

F = (G * m1 * m2) / r^2

Where:
F is the force of gravity
G is the gravitational constant
m1 and m2 are the masses of the two interacting objects
r is the distance between the centers of the two objects

In this case, we know the force of gravity felt by the astronaut on the moon's surface (128 newtons). We also know the mass of the astronaut (which we can assume to be constant) but we need the mass of the moon to calculate the gravitational constant.

Unfortunately, we don't have enough information to calculate the gravitational constant without knowing the mass of the moon. The gravitational constant itself is a fundamental constant and does not change.