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2 years ago

4.

Physics

1 answer:

k0ka [10]2 years ago

5 0

Magnitude is the absolute max velocity a person can reach while falling ⇒ answer D

Explanation:

Terminal velocity is the maximum velocity attainable by an object

as it falls

An object dropped from rest will increase its speed until it reaches terminal velocity
terminal velocity is the point at which the velocity is no longer getting greater
At terminal velocity air resistance force and weight are equal so speed is constant

Example:

A falling person at low altitude will reach terminal velocity after about 12 seconds, falling some 450 m in that time. He will then maintain this speed without falling any faster

Absolute value means the non-negative value

That means the magnitude of the value without its direction

The answer of the question is:

Magnitude is the absolute max velocity a person can reach while falling

Learn more:

You can learn more about terminal velocity in brainly.com/question/7150553

#LearnwithBrainly

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Suppose a rocket ship in deep space moves with constant acceleration equal to 9.80 m/s2, which gives the illusion of normal grav

DochEvi [55]

Answer:

a) 3673469.39 seconds

b) 6.61×10¹⁴ m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity = 0.12×3×10⁸ m/s

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

Equation of motion

$v=u+at\\\Rightarrow 0.12\times 3\times 10^8=0+9.8t\\\Rightarrow t=\frac{0.12\times 3\times 10^8}{9.8}=3673469.39\ s$

Time taken to reach 12% of light speed is 3673469.39 seconds

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{(0.12\times 3\times 10^8)^2-0^2}{2\times 9.8}\\\Rightarrow s=6.61 \times 10^{14}\ m$

The distance it would have to travel is 6.61×10¹⁴ m

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3 years ago

two cars start at the same point and drive in a straight line for 5km. At the end of the drive their distances are the same but

Anna11 [10]

A 'displacement' always consists of a magnitude and a direction. The two cars you just described have displacements with the same magnitude ... 5 km. But if they didn't both drive in the same direction, then their displacements are different.

Remember:

-- 10 m/s² up and 10 m/s² down are different accelerations

-- 30 mph East and 30 mph West are the same speed but different velocity.

-- 5 km North and 5 km South are the same distance but different displacement.

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2 years ago

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Attenuation is the correct answer.

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Answer:

Explanation:

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Explanation:

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