一、求解恒力作用下物体的动量变化物体在恒力的作用下做曲线运动,动量的方向时刻在改变,若用定义式ΔP=P2-P1求物体的动量变化,需要进行矢量运算,较为麻烦,而用动量定理只要求出恒力的冲量,即求得物体的动量变化.例1一质量为m的小球,以初速度v0做平抛运动,从抛出开始计时,在自 First, to solve the constant force of the object under the action of the momentum change The object under constant force to do curve motion, the momentum of the direction of time is changing, if the definition equation ΔP = P2-P1 for the momentum of the object change, the need for vector operations, more Trouble, and use the momentum theorem as long as the momentum of the constant force is found, that is, the momentum of the object change. Example 1 A mass m ball, with the initial velocity v0 do flat throw motion, start timing from the throw, in the