Fortune Telling Collection - Free divination - (20 14? The third model of Wendeng City is shown in Amao's cartoon, which describes a "Meng" who is used to make "sugar-fried chestnuts"
(20 14? The third model of Wendeng City is shown in Amao's cartoon, which describes a "Meng" who is used to make "sugar-fried chestnuts"
(1) at point p? Mg = MVP 22r, and the solution is VP = 2gr.
When reaching point A, the speed direction should be along AB, vy = VP Tan θ = 342 gr
So the height of AD from the ground is h = 3r? vy22g=39 16R。
(2) The speed of entering the slider at point A is v = vpcos θ = 542 gr,
Suppose you can return to point a after a round trip, and the kinetic energy is Ek when you come back.
Ek= 12mv2？ 4μmgcosθ？ 8R
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