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Question Number 21469 by Tinkutara last updated on 24/Sep/17

$$\mathrm{Three}\mathrm{identical}\mathrm{blocks},\mathrm{each}\mathrm{having}\mathrm{a}$$$$\mathrm{mass}M,\mathrm{are}\mathrm{pushed}\mathrm{by}\mathrm{a}\mathrm{force}F\mathrm{on}\mathrm{a}$$$$\mathrm{frictionless}\mathrm{table}.\mathrm{What}\mathrm{is}\mathrm{the}\mathrm{net}\mathrm{force}$$$$\mathrm{on}\mathrm{the}\mathrm{block}A?$$

Commented by Tinkutara last updated on 24/Sep/17

Answered by dioph last updated on 24/Sep/17

$$F_A=Ma=M\frac{F}{3M}=\frac{F}{3}$$

Commented by Tinkutara last updated on 25/Sep/17

$$\mathrm{Yes}\mathrm{I}\mathrm{got}\mathrm{the}\mathrm{same}\mathrm{answer}\mathrm{but}\mathrm{book}$$$$\mathrm{says}F.\mathrm{Is}\mathrm{it}\mathrm{wrong}?$$

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