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amm1812
3 years ago
11

Which situation will cause an object moving at constant speed to speed up

Physics
2 answers:
Citrus2011 [14]3 years ago
8 0

Answer:

If external is force applied

Explanation:

Dmitry_Shevchenko [17]3 years ago
5 0

Answer:A net force greater than 0

Explanation:

Just do the test

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Each wheel of a 320 kg motorcycle is 52 cm in diameter and has rotational inertia 2.1 kg m2 . The cycle and its 75 kg rider are
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Answer:

The value is  h  = 32.91 \  m

Explanation:

From the question we are told that

    The diameter of each wheel is  d =  52 \ cm  =  0.52 \  m

    The mass of the motorcycle is  m  =  320 \ kg

    The rotational kinetic inertia is  I  =  2.1 \  kg \  m^2

    The  mass of the  rider is  m_r =  75 \ kg

     The  velocity is  v  =  85 \  km/hr = 23.61 \  m/s

      Generally the radius of the wheel is mathematically represented as

      r =  \frac{d}{2}

=>     r =  \frac{0.52}{2}

=>    r =  0.26 \  m

Generally from the law of energy conservation

     Potential energy  attained  by  system(motorcycle and rider )  =  Kinetic  energy of the system  +  rotational kinetic energy of  both wheels of the motorcycle

=>  Mgh  =  \frac{1}{2}  Mv^2  +   \frac{1}{2}  Iw^2  +  \frac{1}{2}  Iw^2

=>    Mgh  =  \frac{1}{2}  *  Mv^2  +  Iw^2

Here  w is the angular velocity which is mathematically represented as

     w =  \frac{v }{r }

So

    Mgh  =  \frac{1}{2}  *  Mv^2  +  I \frac{v}{r} ^2

Here M  =  m_r +  m

         M  =  320 + 75

          M  = 395 \  kg

395 *  9.8 *  h  =   0.5    *   395 *  (23.61)^2 +  2.1  *[\frac{ 23.61}{ 0.26} ] ^2

=>   h  = 32.91 \  m

   

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