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Question Number 29924 by ajfour last updated on 13/Feb/18 Commented by ajfour last updated on 13/Feb/18 $${On}\:{a}\:{plank}\:{a}\:{small}\:{block}\:{m}\:{is} \\ $$$${kept}.\:{The}\:{plank}\:{is}\:{free}\:{to}\:{rotate} \\ $$$${about}\:{a}\:{horizontal}\:{axis}\:{at}\:{its}\:{end}. \\ $$$${If}\:{released}\:{as}\:{shown},\:{find} \\ $$$${angle},\:{angular}\:{velocity}\:{of}\:{plank}…
Question Number 29907 by ajfour last updated on 13/Feb/18 Commented by ajfour last updated on 13/Feb/18 $${A}\:{boy}\:{swims}\:{at}\:{speed}\:\boldsymbol{{v}}\:{in}\:{still} \\ $$$${water}\:,\:{walks}\:{on}\:{ground}\:{with} \\ $$$${speed}\:\boldsymbol{\mathrm{w}}\:>\:\boldsymbol{{v}}\:.\:\:{If}\:{he}\:{needs}\:{to}\:{cross} \\ $$$${a}\:{river}\:{of}\:{width}\:\boldsymbol{{b}},\:{water}\:{flowing}\: \\ $$$${at}\:{speed}\:\boldsymbol{{u}},\:{find}\:{the}\:{minimum}…
Question Number 29803 by ajfour last updated on 12/Feb/18 Commented by ajfour last updated on 12/Feb/18 Commented by ajfour last updated on 12/Feb/18 $$\:\:\bar {\boldsymbol{\tau}}\:=\bar…
Question Number 29727 by Tinkutara last updated on 11/Feb/18 Commented by 803jaideep@gmail.com last updated on 11/Feb/18 $$\mathrm{min}\:\mathrm{force}\:\mathrm{550}? \\ $$ Commented by Tinkutara last updated on…
Question Number 29687 by ajfour last updated on 11/Feb/18 Commented by ajfour last updated on 11/Feb/18 $${Find}\:{the}\:{final}\:{velocity}\:{gained}\:{by}\:{a} \\ $$$${tank}\:{of}\:{mass}\:{M},\:{initially}\:{completely} \\ $$$${filled}\:{with}\:{water}\:{and}\:{at}\:{rest},\:{as}\:{it} \\ $$$${slips}\:{on}\:{a}\:{frictionless}\:{ground}\:{owing} \\ $$$${to}\:{a}\:{small}\:{opening}\:{at}\:{its}\:{base}\:{of}…
Question Number 29633 by Tinkutara last updated on 10/Feb/18 Commented by Tinkutara last updated on 10/Feb/18 http://ibb.co/cyaemS Commented by 33 last updated on 11/Feb/18 $${what}\:{are}\:{the}\:{masses}\:{of}\:{n}\:{blocs}?…
Question Number 29611 by ajfour last updated on 10/Feb/18 Commented by ajfour last updated on 10/Feb/18 $${Find}\:{direction}\:{cosines}\:{of}\:{vector}\:\bar {\boldsymbol{{r}}}\:. \\ $$$$\left({in}\:{a}\:{cyclic}\:{form}\:{in}\:{terms}\:{of}\right. \\ $$$$\left.\theta,\phi,\:{and}\:\psi\:\right). \\ $$ Commented…
Question Number 29559 by ajfour last updated on 09/Feb/18 Commented by ajfour last updated on 10/Feb/18 $${Find}\:{minimum}\:{length}\:{of}\:{portion} \\ $$$${BC}\:{of}\:{rope}\:{ABC}\:{of}\:{length}\:{l},\:{mass} \\ $$$${m},\:{in}\:{contact}\:{with}\:{ground}. \\ $$ Commented by…
Question Number 29498 by ajfour last updated on 09/Feb/18 Commented by ajfour last updated on 09/Feb/18 $${Relate}\:{linear}\:{acceleration},\:{with} \\ $$$${position},\:{velocity},\:{angular}\:{velocity}, \\ $$$${and}\:{angular}\:{acceleration}. \\ $$ Answered by…