physic物理问题英文7

来源:百度知道 编辑:UC知道 时间:2024/05/29 01:34:05
1. what do you weigh in pounds? What do you weigh in newtons?
2. What is your mass in kilograms?
3. If you moved to a planet that has the same mass as the Earth but twice the diameter, how would your weight be affected?
4. If you moved to a planet that has twice the mass as the Earth and twice the diameter, how would your weight be affected?

1.
m=100lb
G=mg=(100*0.45359Kg)*9.8N=444.5182N
2.
m=100lb=100*0.45359Kg=45.359Kg
3.
由GmM/r^2=mg知,
物体在行星表面所受重力的大小与行星的半径平方成反比.
所以,重力变为:G'=(1/4)*G=111.13N
4.
由GmM/r^2=mg知,
物体在行星表面所受重力的大小与“行星的质量”成正比,与“行星的半径平方”成反比.
所以,重力变为:G'=(1/2)*G=222。26N

1. what do you weigh in pounds? What do you weigh in newtons?
你的体重有多少磅?你的体重有多少牛顿?
2. What is your mass in kilograms?
你的质量有多少千克?
3. If you moved to a planet that has the same mass as the Earth but twice the diameter, how would your weight be affected?
如果你移动到一个与地球等重,直径两倍于地球的行星上,你的体重会怎样变化?
根据万有引力定律,重力与物体的质量成正比,与距离的平方成反比,所以体重应为地球上的四分之一。
4. If you moved to a planet that has twice the mass as the Earth and twice the diameter, how would your weight be affected?
如果你移动到一个质量两倍于地球,直径两倍于地球的行星上,你的体重会怎样变化?
根据万有引力定律,重力与物体的质量成正比,与距离的平方成反比,所以体重应为地球上的二分之一。