Pls help I need the answers for this
1 answer:
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Answer:
θ = 21.8º
Explanation:
We can solve this exercise using Newton's conditions for equilibrium, in the attached we can see a diagram of the forces.
The most used coordinate system is an axis parallel to the plane (x axis) and an axis perpendicular to the plane (y axis), let's write Newton's equations on this axes
Y Axis
N- = 0
N =
X axis
fr - Wₓ = 0 (1)
Let's use trigonometry to find the normal ones
sin θ = Wₓ / W
cos θ = / W
Wx = W sin θ
= W cos θ
The friction force has the formula
fr = μ N
fr = μ (W cos θ)
We substitute in 1
μ mg cosθ = mg sin θ
μ cos θ = sin θ
tan θ = μ
θ = tan⁻¹ μ
calculate
θ = tan⁻¹ 0.40
θ = 21.8º
Answer:
The frequency shift detected is
Explanation:
From the question we are told that
The normal frequency of the state highway patrol radar guns
The speed of approach is
Now the frequency measure by the the state highway patrol radar guns as your car approaches is mathematically represented as
Where c is the speed of light which a has constant value of
Now
=>
substituting values