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A-uniform-rod-ABC-weight-50N-and-length-4m-rests-with-one-end-A-on-rough-horizontal-ground-and-is-supported-by-a-smooth-peg-at-B-where-AB-2-5m-The-peg-is-2m-from-the-ground-Find-the-reactions-at-

Question Number 57840 by pete last updated on 13/Apr/19 $$\mathrm{A}\:\mathrm{uniform}\:\mathrm{rod}\:\mathrm{ABC},\:\mathrm{weight}\:\mathrm{50N}\:\mathrm{and}\: \\ $$$$\mathrm{length}\:\mathrm{4m}\:\mathrm{rests}\:\mathrm{with}\:\mathrm{one}\:\mathrm{end}\:\mathrm{A}\:\mathrm{on}\:\mathrm{rough} \\ $$$$\mathrm{horizontal}\:\mathrm{ground}\:\mathrm{and}\:\mathrm{is}\:\mathrm{supported}\:\mathrm{by}\: \\ $$$$\mathrm{a}\:\mathrm{smooth}\:\mathrm{peg}\:\mathrm{at}\:\mathrm{B}\:\mathrm{where}\:\mathrm{AB}=\mathrm{2}.\mathrm{5m}. \\ $$$$\mathrm{The}\:\mathrm{peg}\:\mathrm{is}\:\mathrm{2m}\:\mathrm{from}\:\mathrm{the}\:\mathrm{ground}.\:\mathrm{Find}\:\mathrm{the} \\ $$$$\mathrm{reactions}\:\mathrm{at}\:\mathrm{A}\:\mathrm{and}\:\mathrm{at}\:\mathrm{the}\:\mathrm{peg}. \\ $$ Terms of Service…

A-uniform-rod-AB-3m-long-and-weght-120N-rests-in-equilibrium-with-end-A-on-a-rough-horizontal-table-and-supported-by-a-force-P-applied-at-its-end-B-at-right-angles-to-the-rod-The-rod-makes-an-angl

Question Number 57839 by pete last updated on 13/Apr/19 $$\mathrm{A}\:\mathrm{uniform}\:\mathrm{rod}\:\mathrm{AB},\:\mathrm{3m}\:\mathrm{long}\:\mathrm{and}\:\mathrm{weght} \\ $$$$\mathrm{120N},\:\mathrm{rests}\:\mathrm{in}\:\mathrm{equilibrium}\:\mathrm{with}\:\mathrm{end}\:\mathrm{A} \\ $$$$\mathrm{on}\:\mathrm{a}\:\mathrm{rough}\:\mathrm{horizontal}\:\mathrm{table}\:\mathrm{and}\:\mathrm{supported}\: \\ $$$$\mathrm{by}\:\mathrm{a}\:\mathrm{force}\:\mathrm{P}\:\mathrm{applied}\:\mathrm{at}\:\mathrm{its}\:\mathrm{end}\:\mathrm{B}\:\mathrm{at}\:\mathrm{right} \\ $$$$\mathrm{angles}\:\mathrm{to}\:\mathrm{the}\:\mathrm{rod}.\:\mathrm{The}\:\mathrm{rod}\:\mathrm{makes}\:\mathrm{an}\:\mathrm{angle} \\ $$$$\mathrm{of}\:\mathrm{3o}°\:\mathrm{with}\:\mathrm{the}\:\mathrm{table}.\:\mathrm{Find}\:\mathrm{the}\:\mathrm{force}\:\mathrm{P}, \\ $$$$\mathrm{and}\:\mathrm{the}\:\mathrm{reaction}\:\mathrm{at}\:\mathrm{the}\:\mathrm{floor}. \\ $$ Terms…

1-1-2-5-3-10-4-17-5-37-

Question Number 123370 by Dwaipayan Shikari last updated on 25/Nov/20 $$\frac{\sqrt{\mathrm{1}}}{\mathrm{1}}+\frac{\sqrt{\mathrm{2}}}{\mathrm{5}}+\frac{\sqrt{\mathrm{3}}}{\mathrm{10}}+\frac{\sqrt{\mathrm{4}}}{\mathrm{17}}+\frac{\sqrt{\mathrm{5}}}{\mathrm{37}}+… \\ $$ Commented by MJS_new last updated on 25/Nov/20 $$\mathrm{1},\:\mathrm{5},\:\mathrm{10},\:\mathrm{17},\:\mathrm{37}??? \\ $$$$\mathrm{I}\:\mathrm{think}\:\mathrm{it}\:\mathrm{should}\:\mathrm{be}\:\Sigma\:\frac{\sqrt{{n}}}{{n}^{\mathrm{2}} +\mathrm{1}}\:? \\…

A-mercury-based-barometer-reads-760mmhg-at-the-base-of-a-mountain-and-704-0mmhg-at-the-top-Find-the-height-of-the-mountain-if-the-density-of-mercury-and-air-are-respectively-13600kgm-3-and-1-

Question Number 123336 by Lordose last updated on 25/Nov/20 $$ \\ $$$$\mathrm{A}\:\mathrm{mercury}\:\mathrm{based}\:\mathrm{barometer}\:\mathrm{reads} \\ $$$$\mathrm{760mmhg}\:\mathrm{at}\:\mathrm{the}\:\mathrm{base}\:\mathrm{of}\:\mathrm{a}\:\mathrm{mountain}\:\mathrm{and} \\ $$$$\mathrm{704}.\mathrm{0mmhg}\:\mathrm{at}\:\mathrm{the}\:\mathrm{top}.\:\mathrm{Find}\:\mathrm{the}\:\mathrm{height}\: \\ $$$$\mathrm{of}\:\mathrm{the}\:\mathrm{mountain}\:\mathrm{if}\:\mathrm{the}\:\mathrm{density}\:\mathrm{of}\: \\ $$$$\mathrm{mercury}\:\mathrm{and}\:\mathrm{air}\:\mathrm{are}\:\mathrm{respectively} \\ $$$$\mathrm{13600kgm}^{−\mathrm{3}} \:\:\mathrm{and}\:\mathrm{1}.\mathrm{25kgm}^{−\mathrm{3}} \:\left(\mathrm{g}=\mathrm{10ms}^{−\mathrm{2}} \right)…

Find-the-value-of-sin-pi-9-in-exact-form-

Question Number 123248 by Dwaipayan Shikari last updated on 24/Nov/20 $${Find}\:{the}\:{value}\:{of}\:{sin}\left(\frac{\pi}{\mathrm{9}}\right)\:\:{in}\:{exact}\:{form} \\ $$ Commented by MJS_new last updated on 24/Nov/20 $$\mathrm{sin}\:\frac{\pi}{\mathrm{9}}\:=\mathrm{sin}\:\mathrm{20}° \\ $$$$\mathrm{I}\:\mathrm{don}'\mathrm{t}\:\mathrm{think}\:\mathrm{it}'\mathrm{s}\:\mathrm{possible}.\:\mathrm{the}\:\mathrm{smallest} \\ $$$$\mathrm{angle}\:\alpha\:\mathrm{for}\:\mathrm{which}\:\mathrm{we}\:\mathrm{can}\:\mathrm{exactly}\:\mathrm{express}…

let-p-x-5-3-6x-9x-2-and-Q-y-4y-2-4y-13-2-if-there-exist-unique-pair-of-real-number-x-y-such-that-p-x-Q-y-20-then-find-the-value-6x-10y-

Question Number 188730 by universe last updated on 06/Mar/23 $$\:\:\mathrm{let}\:{p}\left({x}\right)\:=\:\frac{\mathrm{5}}{\mathrm{3}}−\mathrm{6}{x}−\mathrm{9}{x}^{\mathrm{2}} \:\mathrm{and}\:{Q}\left({y}\right)\:=\:−\mathrm{4}{y}^{\mathrm{2}} −\mathrm{4}{y}+\frac{\mathrm{13}}{\mathrm{2}} \\ $$$$\mathrm{if}\:\mathrm{there}\:\mathrm{exist}\:\mathrm{unique}\:\mathrm{pair}\:\mathrm{of}\:\mathrm{real}\:\mathrm{number} \\ $$$$\:\left({x},{y}\right)\:\mathrm{such}\:\mathrm{that}\:{p}\left({x}\right)×{Q}\left({y}\right)\:=\:\mathrm{20}\:\mathrm{then} \\ $$$$\:\mathrm{find}\:\mathrm{the}\:\mathrm{value}\:\mathrm{6}{x}+\mathrm{10}{y}\:=\:? \\ $$ Commented by mr W last…