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kkurt [141]
3 years ago
10

What is the difference between convex and concave mirrors and lens?

Physics
1 answer:
Sidana [21]3 years ago
5 0
Concave makes things smaller and convex makes things bigger
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A 55 kg roller skater is at rest on a flat skating rink, a 198 N horizontal force is needed to set the skater in motion.
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Answer:

Explanation:

To get the person Moving you have to overcome the static (means not moving) friction coefficient.  U(static)

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combining the 2 equations you get 198N = U(static)* 55kg *9.8m/s^2   Solve for U(static)

Same equation to keep him moving except with the dynamic force and the dynamic U

 

175N=  U(kinetic)*55kg*9.8m/s^2  Solve (U dynamic)

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The following questions consist of a statement and a reason .Answer these questions selecting the appropriate options given belo
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<em><u>1)A)</u></em>

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HELP!!
raketka [301]
Hello!

Since the two weights are <em>off</em> the table, the block will move towards letter F. 

I hope this helps :))
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