推 bzvxc:2題套公式即可 140.116.145.74 07/05
8. The total energy of a particle is four times its rest energy.
Find (A) its kinetic energy
(B) its speed
2. A particle of mass M moves in the XY plane . Its coordinates as a
funtion of time are given by X(t)= At^3 ; Y(t)= Bt^4+Ct^2
where A B C are constant .
Find (A) its angular momentum about the orgin .
(B) What force acts on it
麻煩各位大大了 ^^
非常謝謝解答 ! ~
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※ 編輯: zzziiii 來自: 140.120.231.90 (07/03 00:59)