問題詳情

32. A cannonball of mass 10.0 kg is fired upward. The cannonball explodes into 3 pieces when it reachesthe maximum height. At the moment of explosion, a 5-kg piece carries velocity

whileanother 4-kg piece carries velocity

. What is the velocity

of the third piece?
(A) Cannot be determined without knowing the energy provided by the explosion
(B)


(C)


(D)


(E)

參考答案

答案：E
難度：計算中-1
書單：沒有書單，新增