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motikmotik
3 years ago
11

A 10-foot ladder is leaning straight up against a wall when a person begins pulling the base of the ladder away from the wall at

the rate of 1 foot per second. Calculate the true distance between the top of the ladder and the ground when the base of the ladder is 9 feet from the wall.
Physics
1 answer:
docker41 [41]3 years ago
8 0

Answer:

y = 4.36

Explanation:

Let the height of the ladder be L

L = 10

Also:

  • Let x = distance\ from\ the\ base\ of\ the\ ladder
  • Let y = height\ of\ the\ base\ of\ the\ ladder

When the ladder leans against the wall, it forms a triangle and the length of the ladder forms the hypotenuse.

So, we have:

L^2 = x^2 + y^2 --- Pythagoras Theorem

When the base is 9ft from the wall, this means that:

x = 9

Substitute 9 for x and 10 for L in L^2 = x^2 + y^2

10^2 = 9^2 + y^2

100 = 81 + y^2

Make y^2 the subject

y^2 = 100 - 81

y^2 = 19

Make y the subject

y = \sqrt{19

y = 4.36

<em>Hence, the true distance at that point is approximately 4.36ft</em>

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We need to know about the magnetic field at the center of circular loops of wire to solve this problem. The magnetic field at the center can be determined as

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From the question above, we know that:

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By substituting the parameter, we get

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B = 4π×10¯⁷ . 1.7 / (2.0.04)

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Due to the perpendicular plane of loops, the total magnetic field at center will be

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Btotal = √(2(2.67 x 10¯⁵²))

Btotal = 3.78 x 10¯⁵ T

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1 year ago
L 10. A car with a mass of 2,000 kilograms is moving around a circular curve at a uniform velocity of 25 meters per second. The
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Centripetal Force, F = mv²/r

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The same 2000 kg truck formerly traveling at 32 m/s, plows into a
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You are asked to calculate how long a new battery will last on a flashlight when the flashlight is turned on. how long should yo
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2 years ago
The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 2.0 rev/s in 11.0 s. At th
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Answer:

Total angular displacement will be  19.998 radian  

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Now the washer slows down and stops in 9 sec

So final angular velocity = 0 rad/sec

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3 0
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