神马作文网sat2 物理题TAT
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sat2 物理题TAT
At the surface of the earth,an object of mass m has a weight w.if this object is transported
to an altitude that’s twice the radius of the earth,then,at the new location,
A.Its mass is m/2 and its weight is w/2
B.Its mass is m and its weight is w/2
C.Its mass is m/2 and its weight is w/4
D.Its mass is m and its weight is w/4
E.Its mass is m and its weight is w/9
At the surface of the earth,an object of mass m has a weight w.if this object is transported
to an altitude that’s twice the radius of the earth,then,at the new location,
A.Its mass is m/2 and its weight is w/2
B.Its mass is m and its weight is w/2
C.Its mass is m/2 and its weight is w/4
D.Its mass is m and its weight is w/4
E.Its mass is m and its weight is w/9
质量不会改变,物体移动到高处地球表面两倍半径,那么受到万有引力为原来的1/9,所以选E.万有引力公式等于重力GMm/R^2=mg