請問一下...

[unknown1 (unknown1)]

請問一下
Find the acceleration of a particle of mass m and velocity v when
it is acted up on by the constant forceF, where F i sparallel to v.

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推 Eisberg:a=F/m
推 unknown1:有解答可是看不懂... 好像要微分有一點複雜~
推 Eisberg:a=F/m+dv/dt 這樣?
推 unknown1:不是... F=d/dt(v/(1-v^2/c^2)) 再繼續化...
→ unknown1:我是不知道繼續化要怎麼化~
推 Eisberg:將F=d(γmv)/dt 乘上dv/dv