3 years ago

You work for NASA and an engineer. Your supervisor is thinking of building a space station instead of a

Physics

1 answer:

expeople1 [14]3 years ago

3 0

Heosndıxnzjdndkdnfmfmfjfmcbvdkfmdj ı dont under stand but ı am dont write

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A box with mass m = 8 kg is pushed x = 10 m across a level floor by a constant applied force F P = 16.27 N. The coefficient of k

vitfil [10]

Answer:

Final speed of the box after it has moved to x = 10 is given as

v = 3.35 m/s

Explanation:

As we know by work energy theorem that work done by all the forces is equal to the change in its kinetic energy

Here work done by external force + work done by friction = change in kinetic energy of the box

so we have

$W_{ex} + W_{fric} = \frac{1}{2}mv^2$

$F x - \mu mg x = \frac{1]{2}mv^2$

$16.27 (10) - (0.15)(8)(9.8) (10) = \frac{1}{2}(8) v^2$

$162.7 - 117.6 = 4 v^2$

$v = 3.35 m/s$

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3 years ago

A flowerpot falls from the ledge of an apartment building. A person in an apartment below, coincidentally holding a stopwatch, n

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Answer

given,

height of window = 4 m

time taken to travel = 1 s

acceleration due to gravity = 9.8 m/s²

$s = ut + \dfrac{1}{2}at^2$

$u = \dfrac{s - \dfrac{1}{2}at^2}{t}$

$u = \dfrac{4 - \dfrac{1}{2}\times 9.8\times 1^2}{1}$

u = -0.905 m/s

initial velocity of ledge v = 0

now,

v² = u² + 2 a s

(-0.905)² = 0 + 2 × 9.8 ×s

s = 0.042 m

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3 years ago

Which fact about the moon, as seen from the earth, is evidence that the amount of time the Moon takes to complete one rotation a

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Choice ' c ' is the evidence.

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Objects that rest have no forces upon them

Pani-rosa [81]

Answer:

false

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every object will always have the force of gravity acting upon it.

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What is the ratio of thicknesses of crown glass and water that would contain the same number of wavelengths of light?

Serhud [2]

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the thickness of the glass divided by thickness of water is going to be 1.333 divided by 1.52, which is 0.877. So, the height of this glass, in order to have the same number of wavelengths as in water, the height of the glass will be 0.877 times the height of the water, and so it will be smaller.

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3 years ago