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3 years ago

What is friction in physics?

Physics

2 answers:

Brilliant_brown [7]3 years ago

6 0

Friction is a force that moves back a sliding object

Triss [41]3 years ago

4 0

Friction is a force that holds back the movement of a sliding object. You will find friction everywhere that objects come into contact with each other. The force acts in the opposite direction to the way an object wants to slide.

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A 7 kg ball of clay traveling at 12 m/s collides with a 25 kg ball of clay traveling in the

ANEK [815]

Answer:

Given: 

m1 = 7 kg

V1 = 12 m/s

m2 = 25 kg

V2 = 6 m/s

To find:

Combined speed of two balls stick together after collision V = ?

Solution:

According to law of conservation of momentum,

m1V1 + m2V2 = (m1+m2)V

7×12 + 25×6 = (7+25)V

84 + 150 = 32V

V = 234/32

V = 7.31 m/s

Combined speed of two ball is 7.31 m/s

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4 0

2 years ago

Sound with frequency 1220Hz leaves a room through a doorway with a width of 1.13m . At what minimum angle relative to the center

mel-nik [20]

Answer:

θ = 14.45º = 0.252 rad

Explanation:

The expression that describes the phenomenon of diffraction is

a sin θ = m λ

Where a is the width of the exit opening in this case the width of the door, Lam is the wavelength, m the diffraction order for destructive interference,

Let's use the relationship between the speed of the wave is the producer of its frequency by the wavelength

v = λ f

λ = v / f

λ = 344/1220

λ = 0.282 m

sin θ = m λ / a

For the first destructive interference m = 1

sin θ = 1 0.282 /1.13

sin θ = 0.24956

θ = sin-1 (0.24956)

θ = 14.45º

We pass radians

θ = 14.45 (pi rad / 180º) = 0.252 rad

4 0

2 years ago

What is the MAJOR IMPORTANT difference between velocity and speed?

il63 [147K]

Well the difference between velocity and speed would be that velocity is basically speed with a direction with a vector assisting with it... and Speed would be distance traveled... I hoped that this helped. :)

5 0

3 years ago

Read 2 more answers

Use the ratio version of Kepler’s third law and the orbital information of Mars to determine Earth’s distance from the Sun. Mars

frez [133]

Answer:

1.49 x $10^{11}$

Explanation:

Kepler's third law states that The square of the orbital period of a planet is directly proportional to the cube of its orbit.

Mathematically, this can be stated as

$T^{2}$ ∝ $R^{3}$

to remove the proportionality sign we introduce a constant

$T^{2}$ = k $R^{3}$

k = $\frac{T^{2} }{R^{3} }$

Where T is the orbital period,

and R is the orbit around the sun.

For mars,

T = 687 days

R = 2.279 x $10^{11}$

for mars, constant k will be

k = $\frac{687^{2} }{(2.279*10^{11}) ^{3} }$ = 3.987 x $10^{-29}$

For Earth, orbital period T is 365 days, therefore

$365^{2}$ = 3.987 x $10^{-29}$ x $R^{3}$

$R^{3}$ = 3.34 x $10^{33}$

R = 1.49 x $10^{11}$

8 0

3 years ago

Read 2 more answers

What is the relationship between the mass, velocity, and momentum of an object?

den301095 [7]

In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object. where m is the mass and v is the velocity. The equation illustrates that momentum is directly proportional to an object's mass and directly proportional to the object's velocity.

3 0

3 years ago

Read 2 more answers