Jeff S. answered • 11/28/14
Tutor
New to Wyzant
Understand Math and History -- not drills and dates!
One point first: the cart has mass, in other words the material stuff that it's made up of. The gravity of the heavenly body that it's on pulls on that mass, and the measure of that pull is its weight.
On Earth, as you said, the cart weighs 67kg. Now, the moon is a lot smaller than earth, with less mass of its own, so its pull is less on the mass of the cart, i.e., the cart weighs less.
How much less? The moon's pull (gravity) is about 1/6 that of Earth, 0.165 to be exact (Earth being 1.0). So you can multiply any earth weight by 0.165 to get the object's moon weight. 67kg multiplied by 0.165 equals 11.055kg.
Answer: on earth, the cart weighs 67kg. On the moon, that same cart weighs 11.055kg.
If you just need an approximate number, simply divide the earth weight (67kg) by 6, since the moon has about 1/6 the gravitational pull that Earth does.
