试题与答案

甲、乙两个物体沿同一直线向同—方向运动时,取物体的初速度方向为正方向,甲的加速度

题型:选择题

题目:

甲、乙两个物体沿同一直线向同—方向运动时,取物体的初速度方向为正方向,甲的加速度恒为2 m/s2,乙的加速度恒为-3 m/s2,则下列说法正确的是( )

A.两物体都做匀加速直线运动,乙的速度变化快

B.甲做匀加速直线运动,它的速度变化快

C.乙做匀减速直线运动,它的速度变化率大

D.甲的加速度比乙的加速度大

答案:

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