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3 years ago

Answer either one or both questions! Must explain and show work to receive brainliest!

Physics

1 answer:

MariettaO [177]3 years ago

3 0

<span>F x L = W x X whereW=weight is total load = 80, L is length from fulcrum which is the unknown and what we are solving for. x= length we know. and F equals 50 force we know. So (W*X)/F=LL equals 64</span>

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A 5 kg bucket is lifted from the ground into the air by pulling in 10 meters of rope with linear density of 2 kg/m at a constant

iren [92.7K]

Answer:

Workdone W = 1465.1 J

Explanation:

The weight of the water = density × volume

weight of the water = 1000 kg/m³ × 100 cm³

weight of the water = 1000 kg/m³ × 0.0001 m³

weight of the water = 0.1 kg

weight of the bucket = 5 kg

weight of the rope = $2*10- 2x\\\\$

= $20- 2x$

Leakage = $\frac{0.1}{10} * x$

= $0.01 x$

Total weight = $5 + 20 - 2x - 0.01 x$

= $25 - 2.01 x$

Force = wg

Force = ( $25 - 2.01 x$ )g

Force = 9.8 ( $25 - 2.01 x$ )

Finally; the amount of work spent in lifting the bucket, rope, and water is calculated as follows:

$W = \int\limits^{10}_0 {(25-2.01 x)} \, 9.8 dx \\\\W = 9.8 (25x - \frac{2.01x^2}{2}})^{10}__0\\\\$

$W = 9.8 (25*10-2.01*50)\\\\W = 1465.1 \ \ J$

7 0

3 years ago

Your friend wants to be magician and intends to use Earth’s magnetic field to suspend a current-carrying wire above the stage. H

sesenic [268]

Answer:

$I=1960A$

Explanation:

Under this condition, . In order to suspend the wire, this magnetic force would have to be equal in magnitude to the gravitational force exerted by Earth on the wire the maximum force at angle

F=ILxB

Now to the suspend the wire so use the maximum force and solve to the current knowing the magnetic field of the earth

∑Fy=0

$F_{m}-F_{g}=0$

$I*L*\beta-m*g=0$

Solve to I current

$I=\frac{m*g}{L*\beta}$

$I=\frac{10x10^{-3}kg*9.8m/s^2}{1m*0.5x10{-4}T}$

$I=1960A$

I suggest do an toher act is really risk that current for an act

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2 years ago

A car travels from rest to 85 m/s and covers 150 meters. How LONG did<br> that take? *

kherson [118]

Answer:

51.76

Explanation:

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2 years ago

Sara wanted to paddle her canoe in the swamp to see alligators. She dragged the 45 Newton canoe for 36 seconds down the boardwal

Dafna11 [192]

Answer:

C .96 meters

Explanation: i just had this question

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2 years ago

Financial planning begins with

suter [353]

<h3><u>Answer;</u></h3>

C. a solid foundation

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3 years ago