如图,一垒球以25m/s的水平速度向左飞向球棒,被球棒打击后以40m

如图,一垒球以25ms的水平速度向左飞向球棒,被球棒打击后以40ms的速度反向水平飞回,设球棒与垒球的作用时间为0.01s,(设向左为正方向),则垒球的速度变化量为           ,其加速度为              

   

答案

-65m/s-6500 m/s2

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