Category: Mechanics

Question Number 132102 by mr W last updated on 14/Feb/21 Commented by mr W last updated on 16/Feb/21 $${a}\:{ball}\:{is}\:{thrown}\:{from}\:{point}\:{A}\:{with} \\ $$$${speed}\:\boldsymbol{{u}}\:{and}\:{strikes}\:{at}\:{a}\:{point}\:{B} \\ $$$${on}\:{the}\:{semispherical}\:{surface}\:{with} \\ $$$${radius}\:{R}\:{and}\:{returns}\:{back}\:{to}\:{point}\:{A}.…

Question Number 131895 by ajfour last updated on 09/Feb/21 Commented by ajfour last updated on 09/Feb/21 $${Q}.\mathrm{131823} \\ $$ Commented by ajfour last updated on…

Question Number 66250 by Tanmay chaudhury last updated on 11/Aug/19 Answered by mr W last updated on 11/Aug/19 $${x}_{{A}} ={r}\:\mathrm{tan}\:\theta \\ $$$${u}=\frac{{dx}_{{A}} }{{dt}}=\frac{{r}}{\mathrm{cos}^{\mathrm{2}} \:\theta}×\frac{{d}\theta}{{dt}} \\…

Question Number 131729 by ajfour last updated on 07/Feb/21 Commented by ajfour last updated on 07/Feb/21 $${Find}\:{radius}\:{of}\:{sphere}\:{of}\:{density} \\ $$$$\rho\:{that}\:{receives}\:{maximum} \\ $$$${normal}\:{reaction}\:{from}\:{wall}. \\ $$ Answered by…