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A Study Community for Everyone and Everything. We have weekly sessions on Spirituality, Math and Science! JEE, NEET prep? All doubts are crowdsourced. Hare Krishna!
im getting 2IRH/3c
im on PC so i cant take a pic but heres what i did :
divide the cone into disks of height dh. take a disk of radius r. consider a small area on it at angle theta as rd(theta) * dh. consider over a time diff dt on this momentum change = IAcos^2(theta)/c * dt
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Howd they get deaccel due to frictional part of surface and shouldn't they also find velocity after it exists the frictional part after colliding from the wall im confused