Question Number 227521 by mr W last updated on 07/Feb/26 Commented by mr W last updated on 07/Feb/26 As shown in the figure, 100 wooden blocks, each with weight 5 N, are clamped by two forces of magnitude F from the left and right. All contact surfaces have the same roughness. What is the friction force between block No. 27 and block No. 28? Which friction coefficient should the contact surfaces at least have? Terms of Service Privacy Policy Contact:…
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Question Number 227276 by mr W last updated on 11/Jan/26 Commented by mr W last updated on 12/Jan/26 $${A}\:{hemispherical}\:{funnel}\:{is}\:{placed} \\ $$$${tightly}\:{against}\:{the}\:{top}\:{of}\:{a}\:{table}.\: \\ $$$${Water}\:{is}\:{poured}\:{into}\:{it}\:{slowly}\: \\ $$$${through}\:{a}\:{small}\:{hole}\:{located}\:{at}\:{the}\:…
Question Number 227024 by mr W last updated on 26/Dec/25 Commented by mr W last updated on 26/Dec/25 $${the}\:{floor}\:{is}\:{smooth}.\:{the}\:{small}\:{ball} \\ $$$${is}\:{released}\:{from}\:{rest}\:{at}\:{the}\:{position} \\ $$$${as}\:{shown}.\:{find}\:{the}\:{locus}\:{of}\:{the}\: \\ $$$${small}\:{ball}\:{in}\:{given}\:{coordinate}…
Question Number 226714 by mr W last updated on 11/Dec/25 Commented by mr W last updated on 11/Dec/25 $${a}\:{dry}\:{rope}\:{with}\:{mass}\:{m}\:{and}\:{length}\:{l}\: \\ $$$${hangs}\:{free}\:{from}\:{two}\:{points}\:{with} \\ $$$${distance}\:{b}\:{to}\:{each}\:{other}.\:{for}\:{some} \\ $$$${reason}\:{the}\:{right}\:{half}\:{of}\:{the}\:{rope}\:…
Question Number 226601 by mr W last updated on 07/Dec/25 Answered by mr W last updated on 07/Dec/25 $${mass}\:{of}\:{particle}={m} \\ $$$${total}\:{mass}\:{of}\:{earth}={M}_{{E}} \\ $$$${radius}\:{of}\:{earth}={R} \\ $$$${F}=\frac{{GmM}}{{x}^{\mathrm{2}}…
Question Number 226572 by mr W last updated on 05/Dec/25 Answered by mr W last updated on 07/Dec/25 Commented by mr W last updated on…
Question Number 226538 by mr W last updated on 02/Dec/25 Answered by mr W last updated on 07/Dec/25 $${length}\:{of}\:{cylinder}\:={L} \\ $$$${cross}−{section}\:=\mathrm{2}{RL} \\ $$$${at}\:{speed}\:{v} \\ $$$${Mv}=\left({M}+\mathrm{2}{RLnmvdt}\right)\left({v}+{dv}\right)…