How much time does it take for a car to attain a speed of 40 m/s when accelerating from rest at 4 m/s{eq}^2 {/eq}? Uniform-Acceleration Motion: When a car accelerates at a constant acceleration from rest, the instantaneous velocity and th...
百度试题 结果1 题目m/s2=2 m/s2,则v=at=2×40 m/s=80 m/s.相关知识点: 试题来源: 解析 [答案] 2 80 反馈 收藏
百度试题 结果1 题目m/s2=8 m/s2 v=at=8×1.5 m/s=12 m/s=43.2 km/h>40 km/h. 此车超速.相关知识点: 试题来源: 解析 答案 见解析 反馈 收藏