作业帮动量问题（我怀疑题目有问题）In motion in the +x direction, you exert a force of magnitude 36 N on an object for 4 seconds, and observe that the magnitude of the object's momentum decreases by 4 kg · m/s. If instead you had exerted a fo
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动量问题（我怀疑题目有问题）In motion in the +x direction, you exert a force of magnitude 36 N on an object for 4 seconds, and observe that the magnitude of the object's momentum decreases by 4 kg · m/s. If instead you had exerted a fo
动量问题（我怀疑题目有问题）
In motion in the +x direction, you exert a force of magnitude 36 N on an object for 4 seconds, and observe that the magnitude of the object's momentum decreases by 4 kg · m/s. If instead you had exerted a force of 18 N on the object for 4 seconds, what would the magnitude of the object's momentum change have been?
动量问题（我怀疑题目有问题）In motion in the +x direction, you exert a force of magnitude 36 N on an object for 4 seconds, and observe that the magnitude of the object's momentum decreases by 4 kg · m/s. If instead you had exerted a fo
先翻译成中文的可以吗
题目有问题。
要么，动量减少的单位是 kg*m/s^2 也就是每秒减少多少动量。
要么，物体还受到另一个阻力的作用。这个可能性比较大。也就是在4秒中这个阻力对动量的影响是-148（36×4-（-4））。
那用18N的话，18×4-148=-76kg*m/s. 就是减少76 kg*m/s。
in english
there is another force ...
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题目有问题。
要么，动量减少的单位是 kg*m/s^2 也就是每秒减少多少动量。
要么，物体还受到另一个阻力的作用。这个可能性比较大。也就是在4秒中这个阻力对动量的影响是-148（36×4-（-4））。
那用18N的话，18×4-148=-76kg*m/s. 就是减少76 kg*m/s。
in english
there is another force in the -x direction. so this force cause the momentum change 36*4-(-4)=148 kg*m/s.
so when i had exerted a force of 18N on the object for 4 seconds. the object's momentum change should be 18*4-148=-76 kg*m/s. that mean the object's momentum decrease by 76 kg*m/s.
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