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inn [45]
2 years ago
12

you went to move a 41 kg bookcase to a different place in the living room. if you push with a force of 65 N and the bookcase acc

elerates at 0.12 m/s2 what is the coefficient of kinetic friction between the bookcase and the carpet?
Physics
1 answer:
ivann1987 [24]2 years ago
7 0

Answer:

the force of friction = fk = (uk)n = 402(uk)

the net force acting to accelerate bookcase = ma = (41)(0.12) = 4.9 N

the {assumed horizontal} push force = 65 N

so

65 - fk = 4.9

fk = 65 - 4.9 = 60 N

uk = 60/402 = 0.15 <= ANS

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Answer:

Exercise 1;

The centripetal acceleration is approximately 94.52 m/s²

Explanation:

1) The given parameters are;

The diameter of the circle = 8 cm = 0.08 m

The radius of the circle = Diameter/2 = 0.08/2 = 0.04 m

The speed of motion = 7 km/h = 1.944444 m/s

The centripetal acceleration = v²/r = 1.944444²/0.04 ≈ 94.52 m/s²

The centripetal acceleration ≈ 94.52 m/s²

8 0
2 years ago
HELP PLEASE!!
aliya0001 [1]

Answer:

m=41 kg

v=0,02 ms

R=2,1 m

F-?

a=v²/R

a=(0,02) ²/2,1=0,0002

F=m*a

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3 0
2 years ago
Which of the
kompoz [17]
C. Amount of oxygen

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8 0
2 years ago
Faraday's Law states that the negative of the time rate of change of the flux of the magnetic field through a surface is equal t
MrRa [10]

Answer:

(C). The line integral of the magnetic field around a closed loop

Explanation:

Faraday's law states that induced emf is directly proportional to the time rate of change of magnetic flux.

This can be written mathematically as;

EMF = -\frac{\delta \phi _B}{\delta t}

(\frac{\delta \phi _B}{\delta t} ) is the rate of change of the magnetic flux through a surface bounded by the loop.

ΔФ = BA

where;

ΔФ is change in flux

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Thus, according to Faraday's law of electric generators

∫BdL = \frac{\delta \phi _B}{\delta t} = EMF

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The correct option is "C"

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8 0
3 years ago
The pupil of a cat's eye narrows to a slit width of 0.5 mm in daylight. What is the angular resolution of the cat's eye in dayli
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Answer:

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<u>C. 10⁻³ rads</u>

4 0
2 years ago
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