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3 years ago

10

Một lò xo nhẹ, treo thẳng đứng có độ cứng k = 100 N/m. Vật nhỏ khối lượng m = 500 g được treo vào đầu dưới của lò xo, dao động đ

iều hòa quanh vị trí cân bằng O. Tính lực đàn hồi của lò xo khi vật trên vị trí cân bằng 9 cm, lấy g = 10 m/s2 .

1 answer:

Lera25 [3.4K]3 years ago

7 0

Answer:20

Explanation:

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BARSIC [14]

<span>b. The coefficient of static friction for all contacting surfaces is Î¼s=0.35. neglect friction at the rollers.

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3 years ago

I can not find the answer to the one after potassium ?

Zepler [3.9K]

Answer:

it’s halogen

Explanation:

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3 years ago

2. Tomas is hanging from a tree limb, that is inclined at a 65° angle. The force

LUCKY_DIMON [66]

Answer:

57 N

Explanation:

Were are told that the force

of gravity on Tomas is 57 N.

And it acts at an inclined angle of 65°

Thus;

The vertical component of the velocity is; F_y = 57 sin 65

While the horizontal component is;

F_x = 57 cos 65

Thus;

F_y = 51.66 N

F_x = 24.09 N

The net force will be;

F_net = √((F_y)² + (F_x)²)

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3 years ago

Which color of light is diffracted at a greater angle from a diffraction grating, red or yellow light?

topjm [15]

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I hope my answer has come to your help. God bless and have a nice day ahead!
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3 years ago

URGENTE ¿Cuál de los siguientes términos corresponde al concepto presión? * A. Es la fuerza perpendicular que ejerce un cuerpo s

melomori [17]

Answer:

Respuesta correcta, opción D: Es la fuerza que un cuerpo ejerce perpendicularmente sobre el área en la que actúa.

Explanation:

La definición de presión es la fuerza que un cuerpo ejerce en dirección perpendicular sobre el área en la que actúa.

Cuando se aplica una fuerza sobre la superficie de un cuerpo, la presión es la siguiente:

$P = \frac{F}{A}$

En donde:

F es la fuerza aplicada.

A es el área del cuerpo.

Por lo tanto la opción correcta es la D: es la fuerza que un cuerpo ejerce perpendicularmente sobre el área en la que actúa.

Espero que se sea de utilidad!

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3 years ago