The picture represents the process that produces most of the energy used by living organisms on Earth
Which process is represented in the picture?
The magnetic attraction between two hydrogen nuclei.
The fusion of hydrogen nuclei to produce a helium nucleus in the core of
the Sun
The fission of hydrogen nuclei to produce a helium nucleus in the core of
the Sun
The chemical reaction between hydrogen nuclei to produce a helium
nucleus in Earth's atmosphere.
the man
d arinen
Auris

a) a = 1,994 m / s² , b)  μ = 0.459

Explanation:

a) This is an exercise of Newton's second law

let's break down the external force

         sin 30 = / F

         F_{y} = F sin 30

         cos 30 = Fₓ / F

         Fₓ = F cos 30

create a frame of reference with the horizontal x-axis and the vertical y-axis, write Newton's second law on each axis

X axis

       Fx-fr = m a       (1)

the friction force has the expression

       fr = μ N

Y xis

     N + F_{y} - W = 0

     N = W -F_{y}

     N = mg - F sin 30

we clear the acceleration of 1

    F cos 30 - μ (mg -F sin 30) = m a

    a = F / m (cos 30 + μ sin30) - μ g

we calculate

    a = 150/30 (cos 30+ 0.32 sin 30) - 0.32 9.8

    a = 5.13 - 3.136

    a = 1,994 m / s²

b) with the box it pushes with cosecant speed its acceleration is zero, we write Newton's second law

     F -fr = 0

     fr = μN

     N-W = 0

     N = mg

we substitute

    F = μ mg

    μ = F / mg

we calculate

    μ = 90 / (20 9.8)

    μ = 0.459