Water from a dam falls vertically into the stream below at a rate of 800kg/s.The time it takes from the dam to the stream is 2.5s.
Q:What is the speed of water when it hits the stream?
Water from a dam falls vertically into the stream below at a rate of 800kg/s.The time it takes from the dam to the stream is 2.5s.
Q:What is the speed of water when it hits the stream?
这道题与做功无关啊
25m/s