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Brut [27]
2 years ago
11

Cart a having a mass of 150 kg initially moving to the right at a speed of 8 m/s collides with cart b with a mass of 150 kg, ini

tially moving to the right at 6 m/s after a collision cart a continues to move to the right but with a speed of 5 m/s
a. what is the speed of cart b after collision
b. what is the total momentum of the system before and after collision
Physics
1 answer:
kakasveta [241]2 years ago
6 0

The speed of cart b is 6m/s while the total momentum of the systmen is 4200 kg m/s

<h3>Conservation of Linear Momentum</h3>

Given Data

  • Mass of cart one M1  = 150kg
  • Initial Velocity U1 = 8m/s
  • Final VelocityV1 = 5 m/s

Mass of cart two M2  = 150kg

Velocity U2 = 6m/s

Applying the principle of conservation of linear momentum we have

M1U1+M2U2 = M1V1+ M2V2

a. what is the speed of cart b after collision

substituting our given data we have

150*8+ 150*6 = 150*5+150*V2

1200 + 900 = 1200+ 150V2

2100 - 1200 = 150V2

900 = 150V2

Divide both sides by 150

V2 = 900/150

V2 = 6m/s

b. what is the total momentum of the system before and after collision

Total Momentum in the system is

Total momentum = Momentum before Impact+ Momentum after Impact

Total momentum = M1U1+M2U2 + M1V1+ M2V2

Total momentum = 1200 + 900 + 1200+ 900

Total momentum = 4200 kg m/s

Learn more about Conservation of Linear Momentum here:

brainly.com/question/7538238

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your schools choir consisting of 10 singers gives a performance producing a sound intensity of 100 dB. At a point in the perform
laila [671]
There are two units of sound: intensity and in decibels. Decibels are not additive, you must convert it first to units of intensity (W/m²) using this formula:

dB = 10 log(I/10⁻¹²)

A.   100 dB = 10 log(I/10⁻¹²)
       Solving for I,
       I = 0.01 W/m²

      90 dB = 10 log(I/10⁻¹²)
      Solving for I,
       I = 0.001

Ratio = 0.01/0.001 = 10
<em>Thus,the choir is 10 times more intense than the soloist.</em>

B. Since there are 90 singers, there would be 9 groups of 10-person choir that produces 100 dB or 0.01 W/m². The total intensity would be

Total intensity = 0.01 W/m² (original choir) + 0.001 W/m² (soloist) + 10(0.01 W/m²) (additional 90 singers) = 0.111 W/m²
dB = 10 log(0.111/10⁻¹²) = <em>110.45 dB</em>

C. Rock concert:
    120 dB = 10 log(I/10⁻¹²)
    Solving for I,
    I = 1 W/m²

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7 0
3 years ago
Please help!! answer as many questions as you know please &lt;3
IRISSAK [1]

Answer: (1) centripetal force is inversely proportional to the radius of an object moving in a circular form.

Centripetal force = mv^{2}/r.

m=mass, v=velocity, r=radius.

(2). Doubling the mass affect the centripetal force following the fact that the centripetal force is directly proportional to the mass therefore, if the centripetal force increases four times (Radius kept constant), the mass increases two times.

(3) If radius is increased, then the centripetal force will decrease.

(4).  If mass is doubled, then the centripetal force will also double.

Explanation:

from the above relation, centripetal force is inversely proportional to the radius and is directly proportional to the mass and velocity.

If only the centripetal force is increase and others are kept as it is, then the moving object will gradually move towards the focus point reducing the radius proportional to the increase in centripetal force.

for example:- relating to mass and velocity, if the centripetal force is increase four times, the mass or velocity will increase two times keeping the radius constant for the condition.

7 0
3 years ago
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