Blocks $A,B,$ and $C$ in $($Figure $1)$ have weights of $45N,35N,$

and $20N,$ respectively.

and $20N,$ respectively.

Determine the smallest horizontal force $P$ that will cause impending motion. The coefficient of static friction between A and $B$ is ${}_s=0\mathrm{.}3,$ between $B$ and $C,$

${}_s^{\text{'}}=0\mathrm{.}4,$ and between block $C$ and the ground, ${}_s^{\text{'}\text{'}}=0\mathrm{.}35.$

Express your answer to three significant figures and include the appropriate units.

$P=$

Previous Answers Request Answer

$$ Incorrect; Try Again; $4$ attempts remaining

Provide Feedback