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ivann1987 [24]
3 years ago
15

A sky diver jumps from a reasonable height above the ground. The air resistance she experiences is proportional to her velocity,

and the constant of proportionality is k = 0.19. It can be shown that the downward velocity of the sky diver at time t is given by v(t) = A(1 − e^-kt) where t is measured in seconds and v(t) is measured in feet per second (ft/s). Suppose A = 64.
(a) Find the initial velocity of the sky diver.
(b) Find the velocity after 5 s and after 15 s. (Round your answers to one decimal place.) ...?
Physics
1 answer:
ch4aika [34]3 years ago
7 0

The initial velocity of the sky diver would be t=0. So put that into the equation:

<span>v(0)=64(1−<span>e<span>(−0.19)(0)</span></span>)

and for b it will be
</span><span>(5)=64(1−<span>e<span>(−0.19)(5)</span></span>)</span><span>, and likewise for t=15. You just need to throw it in a calculator.</span>

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Answer:

x = 11.23  m

Explanation:

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Let's reduce to SI system units

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    w² = w₀² + 2 α θ  

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The relationship between angular and linear velocity

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    v = 27.38 m / s

In this part we have the linear speed and the height that it travels to reach the floor, so with the projectile launch equations we can find the time it takes to arrive

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   t = √ (-2y / g)

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3 years ago
The magnitude of an electron's charge is e=1.60\times 10^{-19}\,\text{C}e=1.60×10 −19 Ce, equals, 1, point, 60, times, 10, start
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Answer:

Explanation:

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Nothing else is written about it

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reviews the approach taken in problems such as this one. A bird watcher meanders through the woods, walking 0.916 km due east, 0
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Answer:

Displacement: 2.230 km    Average velocity: 1.274\frac{km}{h}

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Let's represent displacement by the letter S and the displacement in direction 49.7° as A. Displaement is a vector, so we need to decompose all the bird's displacement into their X-Y compoments. Let's go one by one:

  • 0.916 km due east is an horizontal direction and cane be seen as  direction towards the negative side of X-axis.
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First of all. We need to sum all the X components and all the Y componets.

∑Sx = Ax -0.916 ⇒  ∑Sx = [tex]3.52cos(49.7) - 0.916

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The total displacement is calculated using Pythagoeran therorem:

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With displacement calculated, we can find the average speed as follows:

V = S/t  ⇒  V = \frac{2.230}{1.750}

V = 1.274\frac{km}{h}

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The force on the proton is 17.4 N.

<h3>What is the force on the proton?</h3>

Now we know that the proton is positively charged and that the force on the charge as it moved through the magnetic field could be given by the relation; F = qvB

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F =  1.601019 As * 2.4105 m/s * 4.5 T

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Learn more about magnetic force:brainly.com/question/12824331

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