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iren [92.7K]
2 years ago
7

A 550N object has a coefficient of .012 against a smooth surface. What

Physics
1 answer:
Brrunno [24]2 years ago
4 0

Vertically, the object is in equilibrium, so that the net force in this direction is

∑ <em>F</em> (vertical) = <em>n</em> - <em>mg</em> = 0

where <em>n</em> is the magnitude of the normal force due to the contact between the object and surface. You're given that the object's weight is <em>mg</em> = 550 N, so <em>n</em> = 550 N as well.

Horizontally, the net force would be

∑ <em>F</em> (horizontal) = <em>p</em> - <em>f</em> = 0

where <em>p</em> is the magnitude of the applied force and <em>f</em> is the magnitude of (kinetic) friction opposing <em>p</em>. Now,

<em>f</em> = 0.012<em>n</em> = 0.012 (550 N) = 6.6 N

so that you need to apply a force of <em>p</em> = 6.6 N to keep the object sliding at a steady pace.

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What is the weight of a 48 kg girl on Earth? Rounded to the nearest whole number
Levart [38]

Answer:

471 N

Explanation:

Weight is just another word for the force of gravity.

​Weight is a force that acts at all times on all objects near Earth. The Earth pulls on all objects with a force of gravity downward toward the center of the Earth (g-9.81 m/s2)

so we can simply say

weight =mass * gravitaitonal acceleraition

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6 0
3 years ago
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Yanka [14]

Answer:

the eagle flew 1,025 km

Explanation:

since the eagle flew for 3 hours at 115 km/h it flew a total of 345 km during that time. During the 5 hours at 136 km/h the eagle flew a total of 680 km.

3 0
3 years ago
Which of the following is a composite of a gas and a solid
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<span>{c o {a la manzana o
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3 0
3 years ago
A concave lens has a focal length of 20 cm. A real object is 30 cm from the lens. Where is the image? What is the magnification?
Pani-rosa [81]

Answer:

12 cm and 0.4

Explanation:

f = - 20 cm, u = - 30 cm

Let v be the position of image and m be the magnification.

Use lens equation

1 / f = 1 / v - 1 / u

- 1 / 20 = 1 / v + 1 / 30

1 / v = - 5 / 60

v = - 12 cm

m = v / u = - 12 / (-30) = 0.4

6 0
2 years ago
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Reil [10]

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good? :)

8 0
2 years ago
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