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动量定理

> 从高为H的平台上同时水平抛出两个物体A和B，已知它们的质量m B=2m A,抛出时的速度v A=2v B，不计空气阻力，它们下落过程动量变化量的大小分别为Δp A和Δp B，则( ) A．ΔpA=ΔpB B．ΔpA=2ΔpB C．ΔpB=4ΔpA D．ΔpB=2ΔpA

问题：

发布时间：2020-03-13

从高为H的平台上同时水平抛出两个物体A和B，已知它们的质量m _B=2m _A,抛出时的速度v _A=2v _B，不计空气阻力，它们下落过程动量变化量的大小分别为Δp _A和Δp _B，则( )

A．Δp_A=Δp_B B．Δp_A=2Δp_B

C．Δp_B=4Δp_A D．Δp_B=2Δp_A

参考答案：

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