Posted by **lebo** on Thursday, February 21, 2013 at 4:21pm.

The moon is the earth's nearest neighbor in space the radius of the moon is approximately one quarter of the earth's radius and it's mass is one eightieth of the earth's mass.(a)calculate the weight of an object with a mass of 50.0kg on the surface of the moon.(b)calculate the weight of an object with a mass of 80.0kg when it is at a distance equal to three times the moon's radius away from the moon

- science -
**drwls**, Thursday, February 21, 2013 at 4:37pm
(a) Since the acceleration of gravity at the surface is proptional to M/R^2, it's value on the moon is (1/80)*4^2 = 16/80 or 1/5 of the value on Earth.

The actual value is closer to 1/6.

Weight = (1/5) M*g, where M = 50 kg

and g -= 9.8 m/s^2

(b) Three moon radii from the surface, the acceleration of gravity is 1/9 of the value at the moon's surface.

Weight = (1/45) M*g, where M = 80 kg

- science -
**mandla**, Wednesday, April 17, 2013 at 3:28pm
159

## Answer This Question

## Related Questions

- Science..physics - The moon is the Earth's nearest neighbour in space. The ...
- Physics - The radius of the moon is approximately one quarter of the earth's ...
- physics - can you walk me through this problem At what distance from teh Earth ...
- Physics - The Moon causes tides because the gravitational force it exerts ...
- WSU PHY - The Moon causes tides because the gravitational force it exerts ...
- Physics - Suppose that the ratio of the Moon's mass to the Earth's mass is given...
- physics - show that the weight of an object on moon is one-sixth of its weight ...
- physics - The moon is receding from the Earth by approximately 3.8 cm per year. ...
- Physics - The average distance separating Earth and the Moon (center to center) ...
- physics - 'the mass of the Earth is approximately 80 times the mass of the moon ...

More Related Questions