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Question

https://online-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?cc/DuPage/phys2111/summer/homework/Ch-05-Forces/friction_sliding_2_blocks/sliding_blocks.gif

The two blocks shown above are sliding across a frictionless surface by a force F from the left. The two blocks are not attached but the coefficient of static friction between the two is ?s = 0.37. The mass of the smaller block is m1 = 16 kg and the mass of the larger block is m2 = 87 kg.

a) What is the minimum force required to keep the smaller block from sliding down the larger block?

Explanation / Answer

a=F/(m1+m2) N=m2a=Fm2/(m1+m2) uN=m1*g uFm2/(m1+m2)=m1*g F=501.72 N or if you take g=10 F=512 N F=501.72N(g=9.8 m/s^2) F=512 N(g=10 m/s^2) Take whatever you want

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