3 years ago

You want to place a mirror at a blind turn on the staircase in your house. Which would be best suited for this purpose?

Physics

2 answers:

Vlad [161]3 years ago

7 0

Hello there,

I think "<span>convex mirror" would be your answer!</span>

Elan Coil [88]3 years ago

4 0

Your answer is "convex mirror"

Hope this helps!

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A 49.6-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.584 and 0.399,

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Answer:

(a) Force must be grater than 283.87 N

(B) Force will be equal to 193.945 N

Explanation:

We have given mass of the crate m = 49.6 kg

Acceleration due to gravity $g=9.8m/sec^2$

Coefficient of static friction $\mu _s=0.584$

Coefficient of kinetic friction $\mu _k=0.399$

(a) Static friction force is given by $F_S=\mu _smg=0.584\times 49.6\times 9.8=283.8707N$

So to just start the crate moving we have to apply more force than 283.87 N

(B) This force will be equal to kinetic friction force

We know that kinetic friction force is given by $F_k=\mu _kmg=0.399\times 49.6\times 9.8=193.945N$

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