Two-blocks-are-moving-together-under-the-action-of-a-constant-horizontal-external-force-F-If-the-smaller-block-is-at-rest-with-respect-to-the-bigger-block-due-to-the-friction-between-them-then-the-n

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Question Number 24371 by Tinkutara last updated on 16/Nov/17

$$\mathrm{Two}\mathrm{blocks}\mathrm{are}\mathrm{moving}\mathrm{together}\mathrm{under}$$$$\mathrm{the}\mathrm{action}\mathrm{of}\mathrm{a}\mathrm{constant}\mathrm{horizontal}$$$$\mathrm{external}\mathrm{force}F.\mathrm{If}\mathrm{the}\mathrm{smaller}\mathrm{block}\mathrm{is}$$$$\mathrm{at}\mathrm{rest}\mathrm{with}\mathrm{respect}\mathrm{to}\mathrm{the}\mathrm{bigger}\mathrm{block}$$$$\mathrm{due}\mathrm{to}\mathrm{the}\mathrm{friction}\mathrm{between}\mathrm{them},\mathrm{then}$$$$\mathrm{the}\mathrm{normal}\mathrm{reaction}\mathrm{between}\mathrm{the}\mathrm{bigger}$$$$\mathrm{block}\mathrm{and}\mathrm{floor}\mathrm{is}$$

Commented by Tinkutara last updated on 17/Nov/17

$$\mathrm{Thank}\mathrm{you}\mathrm{very}\mathrm{much}\mathrm{Sir}!$$

Commented by Tinkutara last updated on 16/Nov/17

Commented by ajfour last updated on 16/Nov/17

Commented by ajfour last updated on 16/Nov/17

$$frombalanceofsmallerblock$$$$alongvertical:$$$$f=mg$$$$frombalanceofbiggerblock$$$$alongvertical:$$$$R=mg+f$$$$HenceR=2mg.$$

Commented by mrW1 last updated on 17/Nov/17

$$Youarerightsir!$$

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