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3 years ago

An object is dropped from a 32 m tall building. How fast will it be going when it

Physics

1 answer:

Andrej [43]3 years ago

6 0

Answer:

If there is no air resistance, it would be

25.04 m/sec when it hits the ground

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4. Why do you think people in south Louisiana specialize in seafood?

lbvjy [14]

Answer:

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Explanation:

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3 years ago

An airplane flies with a velocity of 750. kilometers

viktelen [127]

Answer:

650 km/hr

Explanation:

Draw a right triangle from (0.0) (Point A) down 30 degrees and to the right for a length of 750 (Point B). Then draw a line from B up to the x axis to make a right angle (Point C). Use the cosine function to find line AC, the vector portion of AB that lies of the x (East) axis. Cosine(30)= Adjacent/Hypotenuse.

Cos(30) = AC/750

750*(cos(30)) = AC

AC = 649.5 km/hr

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2 years ago

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1. If you walk 10 blocks North, then turn around and walk 4 Blocks to the South before stopping to answer your phone, then turn

icang [17]

Answer: 13 blocks

Explanation:10-4+7=13

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3 years ago

A raindrop of mass 0.5 * 10^-4 kg is falling verctically under the influence of gravity. The air drag on the raindrop is fdrag =

Elina [12.6K]

Answer:

The displacement of the air drop after 3 second is 18.27 m.

Explanation:

Mass of the rain drop = m = $0.5\times 10^{-4} kg$

Weight of the rain drop = W

Duration of time = t = 3 seconds

$W=m\times g$

Drag force on rain drop = $D=0.2\times 10^{-5} v^2$

$W=0.5\times 10^{-4} kg\time 10 m/s^2=0.5\times 10^{-3} N$

Motion of the rain drop:

$F=m\times a$

Net force on the rain drop , F= W - D

$W-D=m\times a$

$0.5\times 10^{-3} N-0.2\times 10^{-5} v^2=0.5\times 10^{-4} kg\times a$

$0.5\times 10^{-3} kg m/s^2-0.2\times 10^{-5} v^2=0.5\times 10^{-4} kg\times \frac{v}{t}$

$0.006v^2+0.05v-1.5=0$

v = 12.18 m/s

Initial velocity of the rain drop = u = 0 (since, it is starting from rest)

v=u+at (First equation of motion)

$12.18 m/s=0m/s+a\times 3 s$

$a=4.06 m/s^2$

$s=ut+\frac{1}{2}at^2$ (second equation of motion)

$s=0\times 3s+\frac{1}{2}\times 4.06m/s^2\times (3 s)^2$

s = 18.27 m

The displacement of the air drop after 3 second is 18.27 m.

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3 years ago

Gina was summarizing what she read to her friends and shared this image, calling it a digital signal. Is she correct in saying t

fredd [130]

The image shows a continuous signal and is not made of numbers, so this signal is an analog signal. Gina is not correct in her identification of the signal.

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3 years ago

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