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> 质量为m的物体静止在光滑水平面上，从t = 0时刻开始受到水平拉力的作用力的大小F与时间t的关系如图所示，力的方向保持不变，则（） A．t0时刻的瞬时速度为 B．在t = 0到t0这段时间内拉力做功为 C．时刻拉力的瞬时功率为 D．在t = 0到这段时间内，拉力的平均功率为

问题：

发布时间：2020-03-13

质量为m的物体静止在光滑水平面上，从t = 0时刻开始受到水平拉力的作用力的大小F与时间t的关系如图所示，力的方向保持不变，则（）

A．t₀时刻的瞬时速度为

B．在t = 0到t₀这段时间内拉力做功为

C．时刻拉力的瞬时功率为

D．在t = 0到这段时间内，拉力的平均功率为

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