Question Number 15538 by tawa tawa last updated on 11/Jun/17 Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 15485 by tawa tawa last updated on 11/Jun/17 Answered by mrW1 last updated on 11/Jun/17 $$\mathrm{Fcos}\:\alpha\geqslant\mu\left(\mathrm{mg}−\mathrm{Fsin}\:\alpha\right) \\ $$$$\mathrm{F}\left(\mathrm{cos}\:\alpha+\mu\mathrm{sin}\:\alpha\right)\geqslant\mu\mathrm{mg} \\ $$$$\mathrm{F}\geqslant\frac{\mu}{\mathrm{cos}\:\alpha+\mu\mathrm{sin}\:\alpha}\mathrm{mg} \\ $$$$\left.\mathrm{a}\right)\:\alpha=\mathrm{0} \\…
Question Number 15474 by tawa tawa last updated on 10/Jun/17 Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 15473 by tawa tawa last updated on 10/Jun/17 Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 80997 by 67549972 last updated on 08/Feb/20 $${give}\:{a}\:{rational}\:{fraction}\:{example}\:: \\ $$$${cancelling}\:{in}\:-\mathrm{1}\:{and}\:\mathrm{2}\:{having}\:{as}\:{a}\:{set}\:{defnition}\:\mathbb{R} \\ $$ Commented by mr W last updated on 08/Feb/20 $${please}\:{use}\:{a}\:{smaller}\:{font}\:{sir}!\:{your} \\ $$$${posts}\:{are}\:{terrible}\:{to}\:{read}!…
Question Number 80994 by 67549972 last updated on 08/Feb/20 $$\mathrm{donnre}\:\mathrm{un}\:\mathrm{exenple}\:\mathrm{de}\:\mathrm{fraction}\:\mathrm{rationnelle}: \\ $$$$\left.\mathrm{1}\right)\mathrm{s}'\mathrm{annulant}\:\mathrm{en}\:-\mathrm{1}\:\mathrm{et}\:\mathrm{2}\:\mathrm{ayant}\:\mathrm{pour}\:\mathrm{ensemble}\:\mathrm{definition}\:\mathbb{R} \\ $$ Commented by malwaan last updated on 08/Feb/20 $$\boldsymbol{\mathrm{Traduire}}\:\boldsymbol{\mathrm{au}}\:\boldsymbol{\mathrm{anglais}}\:;\:\mathrm{S}'\boldsymbol{\mathrm{il}}\:\boldsymbol{\mathrm{vous}}\:\boldsymbol{\mathrm{pla}}\hat {\boldsymbol{\mathrm{i}t}} \\ $$…
Question Number 80973 by Rio Michael last updated on 08/Feb/20 $$\mathrm{Given}\:\mathrm{that}\:{f}\left({x}\right)\:=\:\begin{cases}{\mathrm{2}{x}−\mathrm{7},\:\:\mathrm{0}\:<\:{x}\:<\:\mathrm{6}}\\{\mathrm{2}^{{x}} ,\:\:\:\mathrm{7}\:<\:{x}\:<\:\mathrm{8}}\end{cases} \\ $$$$\mathrm{and}\:\mathrm{f}\:\mathrm{is}\:\mathrm{periodic}\:\mathrm{of}\:\mathrm{period}\:\mathrm{4}. \\ $$$$\mathrm{find}\:{f}\left(\mathrm{200}\right) \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 80974 by Rio Michael last updated on 08/Feb/20 $$\:\mathrm{Show}\:\mathrm{that}\:\mathrm{gcd}\:\left({a}\:,\:{a}\:+\:{x}\right)\:\mid\:{x} \\ $$$${hence}\:{show}\:{that}\:{any}\:{two}\:{consecutive} \\ $$$${integers}\:{are}\:{coprime} \\ $$ Commented by kaivan.ahmadi last updated on 09/Feb/20 $${if}\:{gcd}\left({a},{a}+{x}\right)={d}\Rightarrow{d}\mid{a}\Rightarrow{a}={dy}…
Question Number 15418 by Tinkutara last updated on 10/Jun/17 $$\mathrm{A}\:\mathrm{grasshopper}\:\mathrm{can}\:\mathrm{jump}\:\mathrm{a}\:\mathrm{maximum} \\ $$$$\mathrm{horizontal}\:\mathrm{distance}\:\mathrm{of}\:\mathrm{40}\:\mathrm{cm}.\:\mathrm{If}\:\mathrm{it} \\ $$$$\mathrm{spends}\:\mathrm{negligible}\:\mathrm{time}\:\mathrm{on}\:\mathrm{the}\:\mathrm{ground} \\ $$$$\mathrm{then}\:\mathrm{in}\:\mathrm{this}\:\mathrm{case}\:\mathrm{its}\:\mathrm{speed}\:\mathrm{along}\:\mathrm{the} \\ $$$$\mathrm{horizontal}\:\mathrm{road}\:\mathrm{will}\:\mathrm{be}? \\ $$ Answered by mrW1 last updated…
Question Number 15407 by Tinkutara last updated on 10/Jun/17 $$\mathrm{A}\:\mathrm{ball}\:\mathrm{is}\:\mathrm{thrown}\:\mathrm{vertically}\:\mathrm{upward} \\ $$$$\mathrm{with}\:\mathrm{velocity}\:\mathrm{20}\:\mathrm{m}/\mathrm{s}\:\mathrm{from}\:\mathrm{a}\:\mathrm{rail}\:\mathrm{road} \\ $$$$\mathrm{car}\:\mathrm{moving}\:\mathrm{with}\:\mathrm{a}\:\mathrm{velocity}\:\mathrm{5}\:\mathrm{m}/\mathrm{s} \\ $$$$\mathrm{horizontally}.\:\mathrm{A}\:\mathrm{person}\:\mathrm{standing}\:\mathrm{on}\:\mathrm{the} \\ $$$$\mathrm{ground}\:\mathrm{observes}\:\mathrm{its}\:\mathrm{motion}\:\mathrm{as}\:\mathrm{projectile}. \\ $$$$\mathrm{Find}\:\mathrm{maximum}\:\mathrm{height}\:\mathrm{attained}\:\mathrm{by}\:\mathrm{the} \\ $$$$\mathrm{ball}\:\mathrm{if}\:\mathrm{point}\:\mathrm{of}\:\mathrm{projection}\:\mathrm{is}\:\mathrm{at}\:\mathrm{a}\:\mathrm{height} \\ $$$$\mathrm{3}\:\mathrm{m}\:\mathrm{from}\:\mathrm{the}\:\mathrm{ground}. \\…