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andrew11 [14]
2 years ago
5

If a 3 kg block rests on a rough horizontal table and experienced a 2 N force of static friction then what is the coefficient of

static friction between the block and the table
Physics
1 answer:
Jobisdone [24]2 years ago
8 0

The coefficient of static friction of the block is 0.068.

<h3 />

<h3>What is static friction?</h3>

This is the force between two bodies in contact and tends to oppose their motion. It is also the force that keeps two bodies at rest

To calculate the coefficient of static friction, we use the formula below.

Formula:

  • F = mgμ............. Equation 1

Where:

  • F = Horizontal force
  • m = mass of the block
  • g = acceleration due to gravity
  • μ = coefficient of static friction.

Make μ the subject of the equation

  • μ = F/mg.............. Equation 2

From the question,

Given:

  • m = 3 kg
  • g = 9.8 m/s²
  • F = 2 N

Substitute these values into equation 2

  • μ = 2/(3×9.8)
  • μ = 2/29.4
  • μ = 0.068.

Hence, The coefficient of static friction of the block is 0.068.

Learn more about static friction here: brainly.com/question/13680415

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Near the surface of Earth an electric field points radially downward and has a magnitude of approximately 100 N/C. What charge (
pentagon [3]

Answer:

q=2.997\times 10^{-4}C

Sign-Negative

Explanation:

We are given that

Electric field =E=100NC^{-1} (Radially downward)

Acceleration=0.19 ms^{-2}(Upward)

Mass of charge=3 g=3\times 10^{-3}kg

1kg=1000g

We have to find the magnitude and sign of  charge would have to be placed on a penny .

By newton's second law

\sum F_y=ma

\sum F_y=qE-mg

Substitute the values then we get

qE-mg=ma

Substitute the values then we get

q(100)-3\times 10^{-3}(9.8)=3\times 10^{-3}(0.19)

100q-29.4\times 10^{-3}=0.57\times 10^{-3}

100q=0.57\times 10^{-3}+29.4\times 10^{-3}=29.97\times 10^{-3}

q=\frac{29.97\times 10^{-3}}{100}

q=2.997\times 10^{-4}C

Sign of charge =Negative

Because electric force acting  in opposite direction of electric field therefore,charge on penny will be negative.

4 0
4 years ago
Please help me guys never mind the calculations ​
vlada-n [284]

The shape is connected in parallel so;

5.1) Ans;

\frac{1}{R}  =  \frac{1}{R1} +  \frac{1}{R2}   \\  \frac{1}{R}  =  \frac{1}{2}  +  \frac{1}{3}  \\  \frac{1}{R}  =  \frac{3 + 2}{6}  =  \frac{5}{6}  \\ R =  \frac{6}{5}  = 1.2 \:  \: ohm

5.2) Ans;

\frac{1}{R}  =  \frac{1}{R1} +  \frac{1}{R2}   \\  \frac{1}{R}  =  \frac{1}{8}  +  \frac{1}{10}  \\  \frac{1}{R}  =  \frac{5 + 4}{40}  =  \frac{9}{40}  \\ R =  \frac{40}{9}  = 4.4 \:  \: ohm

I hope I helped you^_^

7 0
3 years ago
What causes air to move or circulate from one place to another?
MAXImum [283]

Answer:

c

Explanation:

simple

3 0
3 years ago
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Oscillations of electricity and magnetism create ________________________ waves, which include visible light waves.
kaheart [24]

Explanation:

radio waves, which include visible light waves.

4 0
3 years ago
A bicyclist traveling at 5 m/s hits a fence, the bicyclist files over the fence. Which
Margarita [4]

The Newton's Laws that BEST describe the situation is Newton's second law of motion.

<h3>What is Newton's second law of motion?</h3>

Newton's second law of motion states, the force exerted by an object is directly proportional to the product of mass and acceleration of the object.

Also, the law can also be states as force is equal to the rate of change of momentum.

F ∝ Δp

Ft = m(v2 - v1)

The force exerted on the bicyclist by the fence is equal to the change in momentum of the bicyclist. The bicyclist was able to fly over the fence because there is a change in his momentum.

Thus, the Newton's Laws that BEST describe the situation is Newton's second law of motion.

Learn more about Newton's second law of motion here: brainly.com/question/3999427

#SPJ1

6 0
2 years ago
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