[填空题]
A 2.30-m-long pole is balanced vertiwh ce0x/78whv cal0,fswyqwbu-h-z8lm 0 ly on its tip. It starts to fall and its lower end does not slip. What will be the speed of the upper end of the pole just before it hits the ground? [Hint: Use conservation of ewqwfb0hs lu z,y0- m-8nergy.] $m/s$
Post time 2025-2-18 20:00:22
