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Lyrx [107]
2 years ago
8

Jus de fruits frais

Physics
1 answer:
Igoryamba2 years ago
5 0

sussybakasussybakasussybaka

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What is The distance traveled by a vehicle in 12 minutes,if it’s speed is 35km/h
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A substance has a volume of 10.0 cm3 and a mass of 89 grams. What is its density?
vovikov84 [41]
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2 years ago
A 75 N box of oranges is being pushed across a horizontal floor. As it moves, it is slowing at a constant rate of 0.90 m/s each
shusha [124]

Answer:

μk = 0.26885

Explanation:

Conceptual analysis

We apply Newton's second law:

∑Fx = m*a (Formula 1)

∑F : algebraic sum of the forces in Newton (N)

m : mass in kilograms (kg)

a : acceleration in meters over second square (m/s²)

Data:

a= -0.9  m/s²,  

g = 9.81 m/s² : acceleration due to gravity

W= 75 N :  Block weight

W= m*g  

m =  W/g = 75/9.8= 7.65 kg :  Block mass

Friction force : Ff

Ff= μk*N

μk: coefficient of kinetic friction

N : Normal force (N)  

Problem development

We apply the formula (1)

∑Fy = m*ay    , ay=0

N-W-25 = 0

N = 75 +25

N= 100N

∑Fx = m*ax    

20-Ff= m*ax    

20-μk*100 = 7.65*(-0.90 )

20+7.65*(0.90) = μk*100

μk = ( 20+7.65*(0.90)) / (100)

μk = 0.26885

4 0
2 years ago
6x+8=32 kết quả x là bao nhiêu
lyudmila [28]

Answer:

4

6x+8=32

6x=32-8

6x=24

x=24/6

x=4

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