A force of 88 N is used to move a couch 2.1 m. How much work is done?

1 answer:

7 0

$Given:\\F=88N\\s=2.1m\\\\Find:\\W=?\\\\Solution:\\\\W=\overrightarrow{F}\circ\overrightarrow{s}\\\\In\;these\;case\\\\W=Fs\;\;\;\;because\;\angle(\overrightarrow{F},\overrightarrow{s})=0\\\\W=88N\cdot 2.1m=184.8J\\\\Correct\;answer\;is\;A$

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A technician is troubleshooting a problem. The technician tests the theory and determines the theory is confirmed. Which of the

vladimir1956 [14]

Answer:

b) Document lessons learned.

Explanation:

First he should do documentation

then C

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3 years ago

A man seeking to set a world record wants to tow a 101,000-kg airplane along a runway by pulling horizontally on a cable attache

NemiM [27]

Answer:

6.19 x $10^{-3}$ m/ $s^{2}$

Explanation:

For this exercise we need to sum the forces on the y-axis and x-axis as follows:

∑ $F_{y}$ = N - mg = m. $a_{y}$ = 0

From the exercise, we deduce there is no motion in y-axis, so:

N = mg

Then for x-axis we have:

∑ $F_{x}$ = H - $f^{s}$ = m. $a_{x}$ = 0

Now, from the exercise we deduce that we are looking for the greatest static friction which means to have the maximun static friction to start moving, so at this point the acceleration is zero, so we can find horizontal force (H), which then will act in the airplane to move it. Therefore we have:

H = $f^{s}$ = $f^{sma_{x} }$ = $u_{s}$ N = $u_{s}$ mg

H = (0.76)(84Kg)(9.8m/ $s^{2}$ )

H = 625.63 N

Now we apply this force to the weight of the plane to find the greatest acceleration the mann can give to start moving the plane.

a = $\frac{F}{m}$ = $\frac{H}{m}$

a = $\frac{6325.63N}{101000Kg}$

a = 6.19 x $10^{-3}$ m/ $s^{2}$

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3 years ago

Explique ¿por que un objeto que tiene energía es capaz de realizar un trabajo?

Nana76 [90]

By striking another object that is free to move, the moving object can exert a force and cause the second object to shift its position. While the object is moving, it has the capacity for doing work. Energy means the ability to do work, so all moving things have energy by virtue of their motion.

Translation: Al golpear otro objeto que se puede mover libremente, el objeto en movimiento puede ejercer una fuerza y hacer que el segundo objeto cambie de posición. Mientras el objeto se mueve, tiene la capacidad de realizar un trabajo. Energía significa la capacidad de realizar un trabajo, por lo que todas las cosas en movimiento tienen energía en virtud de su movimiento.