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larisa86 [58]
1 year ago
10

Two cars are traveling from the same point. Car A has a velocity of 12.5 m/s while car B has zero velocity but an acceleration o

f 3.5 m/s 2 . How far apart will the cars be after 12.0 seconds? What are the final velocities for Cars A and B?
Physics
1 answer:
svp [43]1 year ago
7 0

The distance of separation of the two cars after 12.0 seconds is 102 m

Final velocity, v of A = 12.5 m/s

Final velocity, v of B = 45 m/s

<h3>What are the distance apart of the two car after 12 seconds?</h3>

The distance of separation of the two cars after 12.0 seconds is calculated as follows:

  • The distance travelled by A = velocity * time

Distance travelled by A = 12.5 * 12.0

Distance travelled by A = 150 m

Distance travelled by B is calculated as follows:

  • Distance, s = ut + 1/2at²

u = 0, t = 12.0, a = 3.5 m/s²

Distance travelled by B = 0 * 12.0 + 1/2 * 3.5 * 12²

Distance travelled by B = 252 m

The distance of separation of the two cars after 12.0 seconds = 252 - 150 The distance of separation of the two cars after 12.0 seconds = 102 m

Final velocity, v of A = 12.5 m/s

Final velocity, v of B is calculated as follow;

v = u + at

v = 0 + 3.5* 12

Final velocity of B, v = 45 m/s

In conclusion, the distance of separation and final velocities are determined from the given values of initial velocity and acceleration.

Learn more about acceleration and velocity at: brainly.com/question/11872016

#SPJ1

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A fire engine approaches a wall at 5 m/s while the siren emits a tone of 500 Hz frequency. At the time, the speed of sound in ai
Svetach [21]

Answer:

The  values is  f_b  =14.9 \  beats/s

Explanation:

From the question we are told that

   The  speed of the fire engine is  v =  5\ m/s

    The frequency of the tone is  f =  500 \ Hz

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The  beat frequency is mathematically represented as

     f_b  =  f_a  -  f

Where  f_a is the frequency of sound heard by the people in the fire engine and is is mathematically evaluated as

   f_a  =  [\frac{v_s + v }{v_s  -v} ]* f

substituting values

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Answer:

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Given parameters:

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Speed of the wave  = 5m/s

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Frequency of the wave  = ?

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The distance between crest and the adjacent trough of water waves is known as the wavelength of a wave.

  To find the frequency ;

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