月球引力只有地球的1/6，地球上质量60kg的物体在月球上的质量是 kg，在月球上的重力是 N。
60 98
析：质量是物质的一种属性，只与所含物质的多少有关，与物体的位置、状态、形状、温度无关；重力与物体的质量成正比，即G=mg．
解答：解：（1）质量是物质的一种属性，与物体的位置无关；故宇航员在月球的质量与地球上的质量相等，仍为60g；
（2）宇航员在地球上的重力为G地=mg=60kg×9.8N/kg=588N；在月球上的重力为G月=1/6G地=
×588=98N；
故答案为：（1）60；（2）98．
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| As my train was delayed for two hours, I had plenty of time to spare. After buying some magazines to read on the journey, I gave my wife a long-distance call. Then I 1 my way to the luggage office to collect my heavy suitcase. I had 2 it there three days before. There were quite a few people waiting, and I took out my wallet to find the receipt 3 my case. The receipt seemed not where I had placed it. No matter how 4 I searched, the receipt was nowhere to be found. When my turn came, I explained the situation sorrowfully to the assistant. The man looked me 5 as if to say he had heard this kind of story many times and asked me to tell him what my case looked like. I told him it was an old brown-looking object no different 6 the many cases I could see in his office. The assistant then told me to 7 a list of what was in the case. If it was correct, he said, I could take the case. I tried to remember all the things I had hurriedly 8 into the case and wrote them down as they came to me. After I had done this, I went to 9 round the office. There were hundreds of cases there. For one fearful moment, it came to my mind that if someone had found the receipt he could have easily taken the case already. This had not happened fortunately, for I found the case 10 in the corner. After examining the.things inside, the assistant was satisfied that it was mine, and told me I could take it. | |||
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