Menu Close

Category: Others

Three-blocks-of-masses-m-1-m-2-and-m-3-are-connected-as-shown-All-the-surfaces-are-frictionless-and-the-string-and-the-pulleys-are-light-Find-the-acceleration-of-m-1-

Question Number 21747 by Tinkutara last updated on 02/Oct/17 $$\mathrm{Three}\:\mathrm{blocks}\:\mathrm{of}\:\mathrm{masses}\:{m}_{\mathrm{1}} ,\:{m}_{\mathrm{2}} \:\mathrm{and}\:{m}_{\mathrm{3}} \\ $$$$\mathrm{are}\:\mathrm{connected}\:\mathrm{as}\:\mathrm{shown}.\:\mathrm{All}\:\mathrm{the}\:\mathrm{surfaces} \\ $$$$\mathrm{are}\:\mathrm{frictionless}\:\mathrm{and}\:\mathrm{the}\:\mathrm{string}\:\mathrm{and}\:\mathrm{the} \\ $$$$\mathrm{pulleys}\:\mathrm{are}\:\mathrm{light}.\:\mathrm{Find}\:\mathrm{the}\:\mathrm{acceleration} \\ $$$$\mathrm{of}\:{m}_{\mathrm{1}} . \\ $$ Commented by…

A-very-flexible-uniform-chain-of-mass-M-and-length-L-is-suspended-vertically-so-that-its-lower-end-just-touches-the-surface-of-a-table-When-the-upper-end-of-the-chain-is-released-it-falls-with-each-

Question Number 21731 by Tinkutara last updated on 02/Oct/17 $$\mathrm{A}\:\mathrm{very}\:\mathrm{flexible}\:\mathrm{uniform}\:\mathrm{chain}\:\mathrm{of}\:\mathrm{mass}\:{M} \\ $$$$\mathrm{and}\:\mathrm{length}\:{L}\:\mathrm{is}\:\mathrm{suspended}\:\mathrm{vertically}\:\mathrm{so} \\ $$$$\mathrm{that}\:\mathrm{its}\:\mathrm{lower}\:\mathrm{end}\:\mathrm{just}\:\mathrm{touches}\:\mathrm{the} \\ $$$$\mathrm{surface}\:\mathrm{of}\:\mathrm{a}\:\mathrm{table}.\:\mathrm{When}\:\mathrm{the}\:\mathrm{upper}\:\mathrm{end} \\ $$$$\mathrm{of}\:\mathrm{the}\:\mathrm{chain}\:\mathrm{is}\:\mathrm{released},\:\mathrm{it}\:\mathrm{falls}\:\mathrm{with} \\ $$$$\mathrm{each}\:\mathrm{link}\:\mathrm{coming}\:\mathrm{to}\:\mathrm{rest}\:\mathrm{the}\:\mathrm{instant}\:\mathrm{it} \\ $$$$\mathrm{strikes}\:\mathrm{the}\:\mathrm{table}.\:\mathrm{Find}\:\mathrm{the}\:\mathrm{force}\:\mathrm{exerted} \\ $$$$\mathrm{by}\:\mathrm{the}\:\mathrm{chain}\:\mathrm{on}\:\mathrm{the}\:\mathrm{table}\:\mathrm{at}\:\mathrm{the}\:\mathrm{moment} \\…

A-constant-force-F-20-N-acts-on-a-block-of-mass-2-kg-which-is-connected-to-two-blocks-of-masses-m-1-1-kg-and-m-2-2-kg-Calculate-the-accelerations-produced-in-all-the-three-blocks-Assume-pull

Question Number 21713 by Tinkutara last updated on 01/Oct/17 $$\mathrm{A}\:\mathrm{constant}\:\mathrm{force}\:{F}\:=\:\mathrm{20}\:\mathrm{N}\:\mathrm{acts}\:\mathrm{on}\:\mathrm{a} \\ $$$$\mathrm{block}\:\mathrm{of}\:\mathrm{mass}\:\mathrm{2}\:\mathrm{kg}\:\mathrm{which}\:\mathrm{is}\:\mathrm{connected}\:\mathrm{to} \\ $$$$\mathrm{two}\:\mathrm{blocks}\:\mathrm{of}\:\mathrm{masses}\:{m}_{\mathrm{1}} \:=\:\mathrm{1}\:\mathrm{kg}\:\mathrm{and} \\ $$$${m}_{\mathrm{2}} \:=\:\mathrm{2}\:\mathrm{kg}.\:\mathrm{Calculate}\:\mathrm{the}\:\mathrm{accelerations} \\ $$$$\mathrm{produced}\:\mathrm{in}\:\mathrm{all}\:\mathrm{the}\:\mathrm{three}\:\mathrm{blocks}.\:\mathrm{Assume} \\ $$$$\mathrm{pulleys}\:\mathrm{are}\:\mathrm{frictionless}\:\mathrm{and}\:\mathrm{weightless}. \\ $$ Commented…

Question-152748

Question Number 152748 by Tawa11 last updated on 01/Sep/21 Answered by Olaf_Thorendsen last updated on 01/Sep/21 $$\mathrm{R}_{\mathrm{T}} \::\:\mathrm{total}\:\mathrm{resistance} \\ $$$$\mathrm{E}\:=\:\mathrm{R}_{\mathrm{T}} \mathrm{I}\:=\:\frac{\mathrm{I}}{\frac{\mathrm{1}}{\mathrm{R}}+\frac{\mathrm{1}}{\mathrm{X}}}\:=\:\frac{\mathrm{3A}}{\frac{\mathrm{1}}{\mathrm{5}\Omega}+\frac{\mathrm{1}}{\mathrm{X}}}\:=\:\frac{\mathrm{6A}}{\frac{\mathrm{1}}{\mathrm{2}\Omega}+\frac{\mathrm{1}}{\mathrm{X}}} \\ $$$$\mathrm{3}\left(\frac{\mathrm{1}}{\mathrm{2}}+\frac{\mathrm{1}}{\mathrm{X}}\right)\:=\:\mathrm{6}\left(\frac{\mathrm{1}}{\mathrm{5}}+\frac{\mathrm{1}}{\mathrm{X}}\right) \\ $$$$\mathrm{1},\mathrm{5}+\frac{\mathrm{3}}{\mathrm{X}}\:=\:\mathrm{1},\mathrm{2}+\frac{\mathrm{6}}{\mathrm{X}}…

The-block-of-mass-2-kg-and-3-kg-are-placed-one-over-the-other-The-contact-surfaces-are-rough-with-coefficient-of-friction-1-0-2-2-0-06-A-force-F-1-2-t-N-where-t-is-in-second-is-appli

Question Number 21670 by Tinkutara last updated on 30/Sep/17 $$\mathrm{The}\:\mathrm{block}\:\mathrm{of}\:\mathrm{mass}\:\mathrm{2}\:\mathrm{kg}\:\mathrm{and}\:\mathrm{3}\:\mathrm{kg}\:\mathrm{are} \\ $$$$\mathrm{placed}\:\mathrm{one}\:\mathrm{over}\:\mathrm{the}\:\mathrm{other}.\:\mathrm{The}\:\mathrm{contact} \\ $$$$\mathrm{surfaces}\:\mathrm{are}\:\mathrm{rough}\:\mathrm{with}\:\mathrm{coefficient}\:\mathrm{of} \\ $$$$\mathrm{friction}\:\mu_{\mathrm{1}} \:=\:\mathrm{0}.\mathrm{2},\:\mu_{\mathrm{2}} \:=\:\mathrm{0}.\mathrm{06}.\:\mathrm{A}\:\mathrm{force}\:{F}\:= \\ $$$$\frac{\mathrm{1}}{\mathrm{2}}{t}\:\mathrm{N}\:\left(\mathrm{where}\:{t}\:\mathrm{is}\:\mathrm{in}\:\mathrm{second}\right)\:\mathrm{is}\:\mathrm{applied} \\ $$$$\mathrm{on}\:\mathrm{upper}\:\mathrm{block}\:\mathrm{in}\:\mathrm{the}\:\mathrm{direction}.\:\left(\mathrm{Given}\right. \\ $$$$\left.\mathrm{that}\:{g}\:=\:\mathrm{10}\:\mathrm{m}/\mathrm{s}^{\mathrm{2}} \right)…

Question-21661

Question Number 21661 by tawa tawa last updated on 30/Sep/17 Commented by tawa tawa last updated on 30/Sep/17 $$\left(\mathrm{1}\right) \\ $$$$\mathrm{Oxygen}\:\mathrm{gives}\:\mathrm{three}\:\mathrm{lines}\:\mathrm{in}\:\mathrm{mass}\:\mathrm{spectrometer},\:\mathrm{indicating}\:\mathrm{the}\:\mathrm{existence}\:\mathrm{of} \\ $$$$\mathrm{three}\:\mathrm{types}\:\mathrm{of}\:\mathrm{oxygen}\:\mathrm{atom}\:\mathrm{with}\:\mathrm{masses}\:\mathrm{15}.\mathrm{995},\:\mathrm{16}.\mathrm{999},\:\mathrm{with}\:\mathrm{relative} \\ $$$$\mathrm{abundance}\:\mathrm{of}\:\mathrm{99}.\mathrm{76},\:\mathrm{0}.\mathrm{04}\:\mathrm{and}\:\mathrm{0}.\mathrm{20}\:\mathrm{respectively}.\:\mathrm{Determine}\:\mathrm{the}\:\mathrm{relative}\:…

Question-152723

Question Number 152723 by Tawa11 last updated on 31/Aug/21 Answered by Olaf_Thorendsen last updated on 31/Aug/21 $$\mathrm{V}_{\mathrm{5}\Omega} \:=\:\mathrm{5}\Omega×\mathrm{I}_{\mathrm{5}\Omega} \:=\:\mathrm{5}\Omega×\mathrm{2A}\:=\:\mathrm{10V} \\ $$$$\mathrm{V}_{\mathrm{10}\Omega} \:=\:\mathrm{V}_{\mathrm{5}\Omega} \:=\:\mathrm{10V} \\ $$$$\mathrm{I}_{\mathrm{10}\Omega}…

One-end-of-a-massless-spring-of-constant-100-N-m-and-natural-length-0-5-m-is-fixed-and-the-other-end-is-connected-to-a-particle-of-mass-0-5-kg-lying-on-a-frictionless-horizontal-table-The-spring-rema

Question Number 21628 by Tinkutara last updated on 29/Sep/17 $$\mathrm{One}\:\mathrm{end}\:\mathrm{of}\:\mathrm{a}\:\mathrm{massless}\:\mathrm{spring}\:\mathrm{of}\:\mathrm{constant} \\ $$$$\mathrm{100}\:\mathrm{N}/\mathrm{m}\:\mathrm{and}\:\mathrm{natural}\:\mathrm{length}\:\mathrm{0}.\mathrm{5}\:\mathrm{m}\:\mathrm{is} \\ $$$$\mathrm{fixed}\:\mathrm{and}\:\mathrm{the}\:\mathrm{other}\:\mathrm{end}\:\mathrm{is}\:\mathrm{connected}\:\mathrm{to} \\ $$$$\mathrm{a}\:\mathrm{particle}\:\mathrm{of}\:\mathrm{mass}\:\mathrm{0}.\mathrm{5}\:\mathrm{kg}\:\mathrm{lying}\:\mathrm{on}\:\mathrm{a} \\ $$$$\mathrm{frictionless}\:\mathrm{horizontal}\:\mathrm{table}.\:\mathrm{The}\:\mathrm{spring} \\ $$$$\mathrm{remains}\:\mathrm{horizontal}.\:\mathrm{If}\:\mathrm{the}\:\mathrm{mass}\:\mathrm{is}\:\mathrm{made} \\ $$$$\mathrm{to}\:\mathrm{rotate}\:\mathrm{at}\:\mathrm{an}\:\mathrm{angular}\:\mathrm{velocity}\:\mathrm{of}\:\mathrm{2} \\ $$$$\mathrm{rad}/{s},\:\mathrm{find}\:\mathrm{the}\:\mathrm{elongation}\:\mathrm{of}\:\mathrm{the}\:\mathrm{spring}. \\…

Is-it-also-possible-to-import-text-or-fomulars-from-other-apps-using-the-android-clipboard-

Question Number 21626 by etchemin last updated on 29/Sep/17 $$\mathrm{Is}\:\mathrm{it}\:\mathrm{also}\:\mathrm{possible}\:\mathrm{to}\:\mathrm{import}\:\mathrm{text}\:\mathrm{or}\:\mathrm{fomulars} \\ $$$$\mathrm{from}\:\mathrm{other}\:\mathrm{apps}\:\mathrm{using}\:\mathrm{the}\:\mathrm{android}−\mathrm{clipboard}? \\ $$ Commented by Joel577 last updated on 30/Sep/17 $$\mathrm{No},\:\mathrm{it}\:\mathrm{isn}'\mathrm{t}. \\ $$$$\mathrm{You}\:\mathrm{should}\:\mathrm{convert}\:\mathrm{it}\:\mathrm{to}\:\mathrm{picture}\:\mathrm{or}\:\mathrm{screenshot}\:\mathrm{it} \\…

A-particle-will-leave-a-vertical-circle-of-radius-r-when-its-velocity-at-the-lowest-point-of-the-circle-v-L-is-a-2gr-b-5gr-c-3gr-d-6gr-

Question Number 21604 by Tinkutara last updated on 29/Sep/17 $$\mathrm{A}\:\mathrm{particle}\:\mathrm{will}\:\mathrm{leave}\:\mathrm{a}\:\mathrm{vertical}\:\mathrm{circle}\:\mathrm{of} \\ $$$$\mathrm{radius}\:{r},\:\mathrm{when}\:\mathrm{its}\:\mathrm{velocity}\:\mathrm{at}\:\mathrm{the}\:\mathrm{lowest} \\ $$$$\mathrm{point}\:\mathrm{of}\:\mathrm{the}\:\mathrm{circle}\:\left({v}_{{L}} \right)\:\mathrm{is} \\ $$$$\left({a}\right)\:\sqrt{\mathrm{2}{gr}} \\ $$$$\left({b}\right)\:\sqrt{\mathrm{5}{gr}} \\ $$$$\left({c}\right)\:\sqrt{\mathrm{3}{gr}} \\ $$$$\left({d}\right)\:\sqrt{\mathrm{6}{gr}} \\ $$…