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3 years ago

What happens when an object experiences friction?

2 answers:

5 0

Answer:Whenever a moving object experiences friction, some of its kinetic energy is transformed into thermal energy. Mechanical energy is always transformed into thermal energy due to friction. Mechanical energy is always transformed into thermal energy due to friction.

Explanation:

Whenever a moving object experiences friction, some of its kinetic energy is transformed into thermal energy. Mechanical energy is always transformed into thermal energy due to friction. Mechanical energy is always transformed into thermal energy due to friction.

Feliz [49]3 years ago

4 0

Answer:

its A. because since heat energy means thermal i think it is A and also When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.

Explanation: your welcome and i hope its right

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A model rocket is launched straight upward with an initial speed of 50.0 m/s. It accelerates with a constant upward acceleration

Nonamiya [84]

Answer:

a)5m b)5secs c) 10secs

Explanation:

a) maximum height H = u²/2g

Given u = 50m/s

g = 10m/s²

H = 10²/20

H= 5m

maximum height reached by the rocket is therefore 5m

.b)Time it takes the rocket to reach its maximum height is Tmax = U/g

Tmax = 50/10

Tmax = 5seconds

c) How long the rocket spent in the air is the time of flight T

T = 2U/g

T = 2×50/10

T = 100/10

T = 10seconds

3 0

3 years ago

Which of the following processes forms clouds A. Boiling B.Condensation C.Freezing D.Precipitation

love history [14]

Answer:

Explanation:

6 0

3 years ago

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If the intensity level of one trombone is 70 dB, calculate a reasonable estimate for the intensity level of 76 trombones all pla

kogti [31]

Answer:

β₂ = 88.8 dβ

Explanation:

The intensity of the sound is

β = 10 log (I / I₀)

The sensitivity threshold (I₀) for humans is 1 10⁻¹² W / m²

I = I₀ $10^{\beta /10}$

I = 10⁻¹² 10^{70/10}

I = 1 10⁻⁵ W / m²

The total intensity for the 76 trombones is

I_total = n I

I_total = 76 1 10⁻⁵

I_total = 76 10⁻⁵ W / m²

Let's find the sound level

β₂ = 10 log (76 10⁻⁵ / 10⁻¹²)

β₂ = 88.8 dβ

8 0

3 years ago

An uniform electric field of magnitude E = 100 N/C is oriented along the positive y-axis. What is the magnitude of the flux of t

Ede4ka [16]

Answer:

The magnitude of the flux of electric field through a square of surface area is zero.

Explanation:

$E=100 NC^{-1}\\\\A=2 m^2\\\\Electic\,\,flux\,\,flux\,\,is\,\,given\,\,as:\\\\\phi_E=E.A\,cos\,\theta$

It is given that square box is parallel to yz-plane which has normal vector perpendicular to plane in x-direction. Angle between normal vector of area and electric field is 90°. Substituting in (1)

$\phi_E=E.A\,cos\,(90^o)\\\\\phi_E=0$

4 0

3 years ago

Find the net force and acceleration. 10 points. Will give brainliest.

Afina-wow [57]

Answer:

a) 16 N

b) 2.13 m/s²

Explanation:

Draw a free body diagram of the tv stand. There are four forces:

Weight force mg pulling down,

Normal force N pushing up,

Friction force Nμ pushing left,

and applied force P pulling right.

Sum of forces in the y direction:

∑F = ma

N − mg = 0

N = mg

The net force in the x direction is:

∑F = P − Nμ

∑F = P − mgμ

∑F = 25 N − (7.5 kg) (10 m/s²) (0.12)

∑F = 16 N

Net force equals mass times acceleration:

∑F = ma

16 N = (7.5 kg) a

a = 2.13 m/s²

3 0

3 years ago

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