Let <em>w</em> denote the weight of the sofa, <em>n</em> the magnitude of the normal force, and <em>f</em> the magnitude of the friction force. The sofa is in equilibrium, so by Newton's second law,
<em>n</em> - <em>w</em> = 0
125 N - <em>f</em> = 0
The sofa has a weight of
<em>w</em> = (132 kg) <em>g</em> = 1293.6 N
where <em>g</em> = 9.80 m/s² is the magnitude of the acceleration due to gravity. Since <em>n</em> = <em>w</em>, the normal force has the same magnitude.
The friction force is proportional to the normal force by a factor of the coefficient of static friction <em>µ</em>, such that
<em>f</em> = <em>µ</em> <em>n</em>
Our second equation tells us <em>f</em> = 125 N, so solve for <em>µ</em> :
125 N = <em>µ</em> (1293.6 N)
<em>µ</em> ≈ 0.0966
<span>The ball's gravitational potential energy at its peak height was 0.4 joules, and its .... Ignore air resistance and determine (a) the kinetic energy at 28.1 m, (b) the .... At position B, just before it lands, it is falling at 15m/s. a) if the blocks potential ...</span>
One mole of chlorine is equal to 35.453 grams, while one atom is 35.453 AMU
Hello!
The statement that <span>describes the solar feature shooting off into space labeled C is An envelope of plasma surrounding the Sun.
This is called the Solar Corona. It is the outmost layer of the Sun's atmosphere. The Corona is hotter than the visible surface of the Sun. (1 000 000 - 3 000 000 K). It is composed of Plasma (The fourth state of the matter, similar to the gaseous state, but with electrically charged particles). All structural details of the Solar Corona are derived from the Magnetic Field of the Sun.
Have a nice day!</span>
