【简答题】两个质量分别为 m 1 和 m 2 的木块 A 和 B ,用一个质量忽略不计、劲度系数为 k=3 N/m 的弹簧联接起来,放置在光滑水平面上,使 A 紧靠墙壁,如图所示.用力推木块 B 使弹簧压缩 x 0 =5 cm ,然后释放.已知 m 1 = m= 1 Kg , m 2 = 3 m ,则 释放后, A 、B 两木块速度相等时的瞬时速度的大小为( ) m/s, 弹簧的最大伸长量为( ...
【单选题】题干在#13题 5)Given the graphs and what your friend knows about economics, he recommends you increase the price of adult tickets to $8 each and lower the price of a child's ticket to $3. How much could yo...