Category: Vector

Question Number 126614 by sdfg last updated on 22/Dec/20 Terms of Service Privacy Policy Contact: info@tinkutara.com

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Question Number 126475 by sdfg last updated on 20/Dec/20 Answered by physicstutes last updated on 20/Dec/20 $$\left(\mathrm{a}\right)\mathbf{a}=\frac{\mathbf{\Delta }\mathbf{v}}{\mathbf{\Delta }t}=\frac{[\left(10\mathbf{j}\right)-(10\mathbf{i}+20\mathbf{j})]\mathrm{m}{\mathrm{s}}^{-1}}{(4-0)\mathrm{s}}=[-\left(\frac{10}{4}\right)\mathbf{i}-\left(\frac{10}{4}\right)\mathbf{j}]\mathrm{m}{\mathrm{s}}^{-2}$$$$\mathrm{or}\mathbf{a}=(-\frac{5}{2}\mathbf{i}-\frac{5}{2}\mathbf{j})\mathrm{m}{\mathrm{s}}^{-2}\mathrm{ofcourse}\mathrm{assuming}\mathrm{we}\mathrm{are}\mathrm{using}\mathrm{SI}\mathrm{base}\mathrm{units}.$$$$\:\left(\mathrm{b}\right)\:\boldsymbol{\mathrm{r}}\:=\:\boldsymbol{\mathrm{r}}_{\mathrm{0}} +\:\:\boldsymbol{\mathrm{v}}_{\mathrm{0}} {t}\:+\:\frac{\mathrm{1}}{\mathrm{2}}\boldsymbol{\mathrm{a}}\:{t}^{\mathrm{2}}…

Question Number 126414 by sdfg last updated on 20/Dec/20 Answered by physicstutes last updated on 20/Dec/20 $${\mathrm{Q}}_2.\mathrm{normally}\mathrm{we}\mathrm{should}\mathrm{be}\mathrm{computing}\mid \mathbf{A}\times \mathbf{B}\mid$$$$\mathrm{the}\mathrm{unit}\mathrm{vector}\mathbf{n}\mathrm{could}\mathrm{be}\mathrm{any}\mathrm{unit}\mathrm{vector}\mathrm{they}\mathrm{are}\mathrm{millions}\mathrm{of}\mathrm{them}\mathrm{so}$$$$\mathrm{i}\mathrm{guess}\mathrm{we}\mathrm{can}\mathrm{not}\mathrm{get}\mathrm{a}\mathrm{specific}\mathbf{A}\times \mathbf{B}\mathrm{vector}\mathrm{but}\mathrm{we}\mathrm{can}\mathrm{get}\mid \mathbf{A}\times \mathbf{B}\mid \mathrm{thus}:$$$$\:\mid\boldsymbol{\mathrm{A}}×\boldsymbol{\mathrm{B}}\mid\:=\:\mid\boldsymbol{\mathrm{A}}\mid\mid\boldsymbol{\mathrm{B}}\mid\:\mathrm{sin}\:\theta\:\mid\:\overset{\wedge} {\boldsymbol{\mathrm{n}}}\mid…

Question Number 60628 by cesar.marval.larez@gmail.com last updated on 23/May/19 $$Whoknowdynamicsabout?$$ Terms of Service Privacy Policy Contact: info@tinkutara.com