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Lelu [443]
4 years ago
7

HELP DUE TONIGHT What is friction? How does friction affect the motion of an object?

Physics
1 answer:
hram777 [196]4 years ago
3 0

Answer:

Friction always acts in the direction opposing motion. This means if friction is present, it counteracts and cancels some of the force causing the motion (if the object is being accelerated).

Explanation:

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.

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A piano string having a mass per unit length of 5.00 g/m is under a tension of 1350 N. Determine the speed of transverse waves i
padilas [110]

Answer:

The speed of transverse waves in this string is 519.61 m/s.

Explanation:

Given that,

Mass per unit length = 5.00 g/m

Tension = 1350 N

We need to calculate the speed of transverse waves in this string

Using formula of speed of the transverse waves

v=\sqrt{\dfrac{T}{\mu}}

Where, \mu = mass per unit length

T = tension

Put the value into the formula

v = \sqrt{\dfrac{1350}{5.00\times10^{-3}}}

v =519.61\ m/s

Hence, The speed of transverse waves in this string is 519.61 m/s.

6 0
3 years ago
Give a simple explanation why the pressure changes by this factor.Word Bank:1. two2.greater3.smaller4.four5.eightDoubling the sp
diamong [38]

Answer

speed of the molecules

s₁ = v t

when velocity is doubled

s₂ = (2 v)t

   = 2 s₁

they will hit the wall of container two times as often.

the momentum of molecule

p₁ = mvr

p₂ = m(2v)r = 2(mvr)

    = 2 p₁

the momentum change is two times as great.

force is change in momentum

Δp = F(Δt)

mv-(-mv) = 2 mv

F = \dfrac{2 mv}{\Delta t}

F α v

therefore average force impart to the wall on each collision is two times

p = \dfrac{F_{total}}{A}

p = \dfrac{Nmv^2}{3LA}

p α v²

here the velocity is doubled it means pressure becomes four times.

6 0
3 years ago
El tren Lima la Orolla va a una velocidad de 10 km/h y de pronto aplica el freno por un derrumbe en la via. Si demora 18 segundo
Naya [18.7K]

Answer:

Distancia = 50.04 metros

Explanation:

Dados los siguientes datos;

Velocidad = 10 km/h

Tiempo = 18 segundos

Para encontrar la distancia;

Conversión:

10 km/h = 10 * 1000/3600 = 2.78 m/s

Distancia = velocidad * tiempo

Distancia = 2.78 * 18

Distancia = 50.04 metros

Por lo tanto, el tren viajaría 50.04 metros antes de detenerse por completo.

7 0
3 years ago
The mass of the hammer is 0.454 kg. Calculate the weight of the hammer.
Taya2010 [7]

Explanation:

weight =0.454 × 9.8=4.4492N

4 0
3 years ago
Read 2 more answers
Which situation would most likely increase the carrying capacity for humans in a certain region
marta [7]

Of the following given choices;

A. A higher fertility rate

B. Less access to medicine

C. A new source of fresh water

D. A higher birthrate

The answer is; C

Carrying capacity is the maximum population size than habitat or environment can sustain indefinitely because it is able to replenish its resources. Limiting factors to carrying capacity of an ecosystem include resources such as food, water, and space.

8 0
3 years ago
Read 2 more answers
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