Menu Close

Category: Mechanics

Question-209597

Question Number 209597 by peter frank last updated on 16/Jul/24 Answered by mr W last updated on 16/Jul/24 $${ma}={mg}\:\mathrm{sin}\:\theta−\mu{mg}\:\mathrm{cos}\:\theta \\ $$$$\frac{{a}}{{g}}=\mathrm{sin}\:\theta−\mu\:\mathrm{cos}\:\theta \\ $$$$\mu=\frac{\mathrm{1}}{\mathrm{cos}\:\theta}\left(\mathrm{sin}\:\theta−\frac{{a}}{{g}}\right) \\ $$$$\:\:\:=\frac{\mathrm{1}}{\mathrm{cos}\:\mathrm{60}°}\left(\mathrm{sin}\:\mathrm{60}°−\frac{\mathrm{1}}{\mathrm{2}}\right)…

Question-209358

Question Number 209358 by peter frank last updated on 08/Jul/24 Commented by mr W last updated on 08/Jul/24 $${if}\:{the}\:{bowl}\:{is}\:{smooth},\:{why}\:{should}\:{the}\: \\ $$$${small}\:{block}\:{rotate}\:{with}\:{the}\:{bowl}\:{and} \\ $$$${not}\:{fall}\:{to}\:{the}\:{middle}\:{of}\:{the}\:{bowl}? \\ $$…

Question-209359

Question Number 209359 by peter frank last updated on 08/Jul/24 Commented by mr W last updated on 08/Jul/24 $$“{with}\:{a}\:{vertical}\:{velocity}\:{v}''\:{should}\:{be} \\ $$$$“{with}\:{a}\:{velocity}\:{v}''. \\ $$$${answer}\:\frac{{v}^{\mathrm{2}} −{g}^{\mathrm{2}} {x}^{\mathrm{2}}…

Question-209161

Question Number 209161 by Spillover last updated on 02/Jul/24 Commented by klipto last updated on 03/Jul/24 $$ \\ $$$$\boldsymbol{\mathrm{F}}_{\boldsymbol{\mathrm{net}}} =−\left(\boldsymbol{\mathrm{F}}_{\mathrm{g}} +\boldsymbol{\mathrm{P}}\right) \\ $$$$\boldsymbol{\mathrm{ma}}=−\left(\boldsymbol{\mathrm{mg}}+\mathrm{0}.\mathrm{2}\boldsymbol{\mathrm{v}}^{\mathrm{2}} \right) \\…