问题
填空题
如下图所示，一个轻质杠杆在水平位置平衡，此时弹簧测力计的示数为1.5N，若物体M由A点移到B点，弹簧测力计由B点移至A点，要使杠杆仍保持水平位置平衡，则弹簧测力计示数应为 N。
答案
6N
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如下图所示，一个轻质杠杆在水平位置平衡，此时弹簧测力计的示数为1.5N，若物体M由A点移到B点，弹簧测力计由B点移至A点，要使杠杆仍保持水平位置平衡，则弹簧测力计示数应为 N。
6N
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| What do you do at the weekend?Some people like to 1 at home,but others like to go 2 a walk or play football.My friend Jack works hard in a factory during the 3 .At the weekend,he always 4 the same thing.On Saturday he 5 his car and 6 he goes with his family to a village by car. His uncle and aunt have a farm there.It isn't a 7 one but there's always 8 to do on the farm.The children help with the animals and give them their 9 .Jack and his wife help in the field.At the end of the day,they are all 10 and Jack's aunt gives them a big meal.
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