Which of the following examples illustrates static friction in action?

Physics

2 answers:

Slav-nsk [51]3 years ago

7 0

<h3>Answer;</h3>

D. a car starting to move after the light changes from red to green

<h3>Explanation;</h3>

Static friction is a type of friction or a force that is experienced by a body or a substance at rest. Therefore, when a force is applied on a body or an object at rest it opposes the static friction.
Static friction does not have the ability to move an object or induce motion since it is countered by other strong opposite forces. Static friction must be overcome to cause motion of the object.
When a body or an object is in motion it experiences kinetic friction. Therefore, when a body at rest starts to move then the friction changes to kinetic friction.

lilavasa [31]3 years ago

3 0

I think its d. but im not sure

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Vector B has x, y, and z components of 2.4,

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The magnitude of the vector B is 10.9

A vector is a quantity which has magnitude as well as direction and it follows vector laws of addition.

To calculate the magnitude of the vector, we have to put the square of the components of the vector along the axes under the root.

Vector B has components,

x = 2.4

y = 9.8

z = 4.1

Applying the formula,

|B| = √x²+y²+z²

|B| = √(2.4)² + (9.8)² + (4.1)²

|B| = √5.76+96.04+16.81

|B| = √118.61

|B| = 10.9

Talking about the direction the the Vector B, it will be the line joining the origin with the points (2.4,9.8,4.1)

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3 0

1 year ago

Need help in the middle one

kondor19780726 [428]

Answer:

Guysi hate math answer this guy plsss ssss

7 0

3 years ago

Use the graph below to answer the following question: What is happening to the object's velocity?

hjlf

The object's velocity is decreasing.

Explanation:

From graph is the attached image, we can clearly point that the velocity of this motion is decreasing with time.

Velocity is a vector quantity.

The y-axis represent displacement.
The x-axis depicts time
Using the graph, we know that the slope of the line on the graph gives us the velocity as it denotes the change of displacement with time.
When we find the slope, it will give us a negative value which shows that the body is slowing down and not increasing speed.

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