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3 years ago

What is friction? How does it affect the motion of an object?

Physics

1 answer:

AfilCa [17]3 years ago

4 0

the resistance that one surface or object encounters when moving over another.

"a lubrication system that reduces friction"

synonyms: abrasion, abrading, rubbing, chafing, grating, rasping, scraping, excoriation, grinding, gnawing, eating away, wearing away/down; More

the action of one surface or object rubbing against another.

"the friction of braking"

Friction is an important force because it is a force that affects motion. This force exerted by the surface of an object when another object moves against it is the result of molecular attractions between the objects' surfaces, and works in the direction opposite to the direction of the motion.

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from an origin you walk 3 meters east 7 meters west and then 6meters east . where are you now relative to the origin?

german

You take 3 steps east, turn around & take another 7 steps west (4 steps always from origin) you turn around again and take 6 more steps east - 2 steps always from origin

3 0

4 years ago

Question 3 (1 point)

FrozenT [24]

The force of friction is equal to the pushing force, and the acceleration is zero

Explanation:

In this problem, we are pushing a piano along the floor, in the horizontal direction.

There are 2 forces acting in the horizontal direction on the piano:

The applied force, $F_a$ , acting forward
The force of friction, $F_f$ , acting backward

Therefore, the net force in the horizontal direction is

$\sum F = F_a - F_f$

According to Newton's second law, the net force is equal to the product between the piano's mass (m) and its acceleration:

$\sum F = ma$

Combining the two equations,

$F_a - F_f = ma$

However, we are also told that the piano moves at constant speed, therefore the acceleration is zero:

$a=0$

And so,

$F_a - F_f = 0\\F_f = F_a$

which means that the force of friction is equal to the applied force.

Learn more about Newton's second law:

brainly.com/question/3820012

#LearnwithBrainly

3 0

3 years ago

A thin film of cooking oil ( n = 1.47 ) is spread on a puddle of water ( n = 1.35 ) . What is the minimum thickness D min of the

zlopas [31]

Answer:

The minimum thickness of the oil is 77.55 nm

Explanation:

Given:

Refractive index of oil $n_{o} = 1.47$

Refractive index of water $n_{w} = 1.35$

Wavelength of light $\lambda= 456 \times 10^{-9}$ m

From the equation of thin film interference,

The minimum thickness is given by,

$2n_{o} t = (n+\frac{1}{2}) \lambda$

Where $n = 0,1,2,3.........$ , $t =$ thickness

Here we have to find minimum thickness so we use $n = 0$

$2n_{o} t =( 0+\frac{1}{2} )\lambda$

$t = \frac{\lambda }{4 n_{o} }$

$t = \frac{456 \times 10^{-9} }{4 \times 1.47}$

$t = 77.55 \times 10^{-9}$ m

$t = 77.55$ nm

Therefore, the minimum thickness of the oil is 77.55 nm

7 0

4 years ago

To become positively charged, an atom must:

blagie [28]

Answer:

Explanation:

Cause im smart smart and the atom is very simple just use google lol

6 0

3 years ago

What is the period of a pendulum that takes 3 seconds to move forward, and another 3 seconds to come back?

Serga [27]

The period of the pendulum is 6 seconds.

<h3>What is period?</h3>

Period is the time taken for a simple pendulum to move to(forward) and fro(backward). The s.i unit of period is seconds(s).

Note: When a simple pendulum moves to and fro. it completes one cycle.

From the question, The period of the pendulum is calculated using the formula below.

<h3>Formula</h3>

T = a+b.............. Equation 1

Where:

T = Period of the pendulum
a = Time taken for the pendulum to move forward
b = Time taken for the pendulum to move backward.

From the question,

Given:

a = 3 seconds
b = seconds

Substitute the values above into equation 1

T = 3+3
T = 6 seconds.

Hence, The period of the pendulum is 6 seconds.

Learn more about period here: brainly.com/question/21924087

5 0

3 years ago