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dalvyx [7]
2 years ago
10

A push or pull is called a force. Unbalanced forces can cause objects to move in many ways but not to

Physics
1 answer:
galina1969 [7]2 years ago
5 0

Answer:

d. float in the air

Explanation:

im not aure

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I think it is c I'm only in 7th grade but I'm pretty sure that the answer is c
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A copper wire 20 m long and 4mm in diameter is attached to the Ceiling and a 400 N
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A

Explanation:

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2 years ago
28. Which of the following correctly shows the order of highest amount of friction to the lowest amount of
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Answer:

\mathrm{d.\:Static,\: Sliding,\:Rolling}

Explanation:

Static friction occurs when an object initially starts at rest. When the surfaces of the materials touch, the microscopic unevenness interlock greatest with each other, causing the most friction out of the three.

During sliding friction, an object is already moving or in motion. The microscopic surfaces still interlock, but because the object is in motion, it has a momentum. Therefore, the magnitude of sliding friction is less than that of static friction.

Rolling friction occurs when an object rolls across some surface. Rather than surfaces interlocking, rolling friction is caused by the constant distortion of surfaces. As it rolls, the surfaces of the object are constantly wrapping and changing. This distortion causes the rolling friction. However, it is much less in magnitude when compared to static or sliding friction.

4 0
2 years ago
Starting from rest, a 6.79 kg block slides 2.82 m down a rough 20.7 ◦ incline. The coefficient of kinetic friction between the b
Veronika [31]

Answer:

23.52092 J

Explanation:

m = Mass of block = 6.79 kg

s = Sliding distance = 2.82 m

\theta = Angle of slide = 20.7°

\mu = Coefficient of kinetic friction = 0.425

g = Acceleration due to gravity = 9.8 m/s²

Work done by the force of gravity is given by

W=mgsin\theta\\\Rightarrow W=6.79\times 9.8\times sin20.7\\\Rightarrow W=23.52092\ J

The work done by the force of gravity is 23.52092 J

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3 years ago
According to Newton’s Third Law, action and reaction are
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<span>B. equal and in opposite directions</span>
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