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lord [1]
4 years ago
9

A car accelerates from 30 ft/s to 90 ft/ sec in 6 seconds

Physics
1 answer:
Softa [21]4 years ago
7 0

Its acceleration is 10ft/ sec

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3 years ago
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse
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Answer:

The time interval is t  =  5.48 *10^{-3} \ s

Explanation:

From the question we are told that

   The length of the string is  l  =  3.00 \ m

    The  mass of the string is m  =  5.00 \ g  =  5.0 *10^{-3}\ kg

     The  tension on the string is  T  =  500 \ N

   

The  velocity of the pulse is mathematically represented as

      v  = \sqrt{ \frac{T}{\mu } }

Where \mu is the linear density which is mathematically evaluated as

       \mu  =  \frac{m}{l}

substituting values

     \mu  =  \frac{5.0 *10^{-3}}{3}

     \mu  = 1.67 *10^{-3} \  kg /m

Thus  

     v = \sqrt{\frac{500}{1.67 *10^{-3}} }

    v = 547.7 m/s

The time taken is evaluated as

    t  =  \frac{d}{v}

substituting values

      t  =  \frac{3}{547.7}

      t  =  5.48 *10^{-3} \ s

5 0
4 years ago
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