PHYSICS MIDDLE SCHOOL

Why does friction increase as speed INCREASES?Please explain using the big idea of particles

Answers

Answer 1

Answer:

Explanation:

Frictional force is an opposing force or a drag force. It is given by :

$F=\mu N$

Where

μ is the coefficient of friction

N is the normal force

We know that the product of mass and the acceleration is called the force acting on the object. This means as the speed of the object increases, its drag force increases exponentially.

When the speed of an object increases, the attraction between the particles increases. Hence, the frictional drag increases.

Answer 2

Answer:

Due to a number of variables, friction is worse as speed gets faster. The production of heat as a result of enhanced molecularinteraction is one of the key causes.

The frequency and force of surface molecule collisions increase as an object's velocity against another object increases, producing more heat.

This rise in temperature increases the stickiness or adhesion between the surfaces, which makes moving objects more difficult. Higher speeds can result in more pronounced relative movement of surface imperfections and microstructures, increasing interlocking and frictional forces.

Thus, as speed increases, friction increases due to a mixture of increased heat generation, adhesion, and interlocking effects.

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a block of aluminum has a density of 2.7 g/cm. if the block is cut in half, what will be the density of each half?

Answers

2.7 is what i got to? Hope this helps have a good day

Final answer:

The density of each half of the aluminum block remains the same as the original block, 2.7 g/cm³. Density is an intrinsic property of a material and does not change when the amount of the material changes.

Explanation:

The density of a material remains constant regardless of the amount of that material. The density is an intrinsic property defined as mass divided by volume. When you cut a block of aluminum in half, you are halving both the mass and the volume. Since both are reduced by the same proportion, the ratio of mass to volume (i.e., the density) stays the same. Thus, the density of each half of the aluminum block remains 2.7 g/cm³.

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What kind of field does a direct current produce?

Answers

I produce magnetic field.

Produce magnetic field

How does the charge not originate in a battery?

Answers

The charge in a battery does NOT come from tiny tiny men inside the battery turning microscopic electric generators.

Besides bones, the skeleton also contains connective tissues called the ???

Answers

Collagenous fibers - Purpose : Bind bones and other tissues to each other

Elastic Fibers : - Purpose : Allow organs like arteries and lungs to recoil

Reticular Fiber : - Purpose : Form a scaffolding for other cells

Hope this helps ! <3 :)

Besides bones, the skeleton also contains connective tissues called the Cartilage. It is usually flexible and tough.

The SI units for measuring the velocity of the car: The SI units for measuring the acceleration of the car: The SI units for measuring force: The SI units for measuring mass: