Physics, 17.12.2020 23:50 darkpain4371

The coefficient of kinetic friction between an object and the surface upon which it is sliding is 0.6. The mass of the object is 12 kg. What is the force of friction

Answers: 3

Show answers

Answers

Answer from: DepressionCentral

$F_s^{k} = 70.56 \ N$

General Formulas and Concepts:

Physics 1 - Newton's Law of Motion

Gravity: 9.8 m/s²Static/Kinetic Friction Formula: $F_s^k = F_n \cdot U_k$ Free Body Diagram

Explanation:

Step 1: Define Variables

$Mass = 12 \ kg$

U_k = 0.6

Step 2: Find Normal Force

See Attachment for FBD.

Substitute: Fg = (12 kg)(9.8 m/s²)Multiply: Fg = 117.6 NRedefine: Fn = 117.6 N

Step 3: Find Kinetic Friction

Substitute: Fs = (117.6 N)(0.6)Multiply: Fs = 70.56 N
The coefficient of kinetic friction between an object and the surface upon which it is sliding is 0.

Answer from: babygirlqueen5588

70.56 N

Explanation:

The formula for kinetic friction is fₖ = μₖ * n, where μₖ is the coefficient of kinetic friction and n is the normal force.

The question gives us the value of the coefficient of kinetic friction, but it does not explicitly give us the normal force.

Let's draw a free-body diagram to see the forces that are acting on the object. I attached an image of what the free-body diagram should look like.

We can see that there are three forces being applied to the object: the normal force, weight force, and the (kinetic) friction force.

Since the object has a net force of 0 in the y-direction (it is not moving vertically), we can use Newton's 2nd Law to prove that the normal force and the weight force are equal to each other.

Newton's 2nd Law of Motion tells us that F = ma, so we can apply it in this instance by saying the sum of all forces in the y-direction is equal to 0, since there is no acceleration in the vertical direction.

∑F_y = 0 ∑F_y = n - w = 0

The two forces acting on the object in the y-direction must subtract to become 0 since the net force must be 0.

Therefore, by adding w to both sides of the equation, we get:

∑F_y = n = w

We know that n = w, so by solving for the weight force we can find the normal force.

The weight force w can also be written as mg, where m = mass (kg) and g = 9.8 m/s² (acceleration due to gravity).

We are given the mass of the object, so we can plug it into mg to solve for the weight force.

w = mg = (12 kg)(9.8 m/s²) w = 117.6 N

The weight force is equal to 117.6 N, and since the normal force is equal to the weight force, we can say that the normal force is also equal to 117.6 N.

Now that we have the normal force, we can plug it into the formula for the force of kinetic friction:

fₖ = μₖ * n fₖ = (0.6) * (117.6) fₖ = 70.56 N

The force of kinetic friction between the object and the surface is 70.56 N.

FBD:

Answer from: Quest

coil wire, increase current, put iron inside the coil

Answer from: Quest

hi i’m sorry to call us today so we will get back with y’all and we will have to do it haha omg was the day

Other questions on the subject: Physics

Physics, 22.06.2019 09:40, goofy44

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.

Answers: 3

continue

Physics, 22.06.2019 11:30, bermudezs732

The least penetrating form of radiation is

Answers: 1

continue

Physics, 22.06.2019 12:50, starr3971

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

Answers: 2

continue

Physics, 22.06.2019 13:30, Bra1nPowers

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.

Answers: 3

continue

You know the right answer?

The coefficient of kinetic friction between an object and the surface upon which it is sliding is 0....