3 years ago

Combustion reactions are also ________ reactions. A. nuclear B. exothermic C. endothermic D. spontaneous

Physics

2 answers:

Roman55 [17]3 years ago

7 0

The answer is a hopefully I helped

sveta [45]3 years ago

5 0

I think is a) i hope this hlp

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Nataliya [291]

Attached a diagram of the scheme described in the problem ..

To solve the problem we need to know the relationship between kinetic and normal force, so

$F_k=\mu_k F_N (1)$

Where

$\mu_k =$ coefficient of kinetic

$F_N=$ Normal force

We perform the sum of forces as well,

$\sum F_x = Ma$ (2)

$a= Acceletarion$

For Normal Force in Y,

$F_N= Mgcos \theta$ (3)

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$\sum F_x = Mgsin\theta - F_x$ (4)

Replacing in (4)

$Ma = Mgsin\theta - \mu_k F_N$

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