A polar bear runs at a speed of 11 m/s and has a mass of 380.2 kg. How much Kinetic energy does the bear have?

Question

A polar bear runs at a speed of 11 m/s and has a mass of 380.2 kg. How much Kinetic energy does the bear have?

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Hải Đăng 5 months 2021-08-04T06:42:11+00:00 1 Answers 8 views 0

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    2021-08-04T06:43:47+00:00

    Answer:

     \boxed{\sf Kinetic \ energy \ of \ the \ bear (KE) = 23002.1 \ J}

    Given:

    Mass of the polar bear (m) = 6.8 kg

    Speed of the polar bear (v) = 5.0 m/s

    To Find:

    Kinetic energy of the polar bear (KE)

    Explanation:

    Formula:

     \boxed{ \bold{\sf KE =  \frac{1}{2} m {v}^{2} }}

    Substituting values of m & v in the equation:

     \sf \implies KE =  \frac{1}{2}  \times 380.2 \times  {11}^{2}

     \sf \implies KE = \frac{1}{ \cancel{2}}  \times  \cancel{2} \times 190.1 \times 121

     \sf \implies KE = 190.1 \times 121

     \sf \implies KE = 23002.1 \: J

     \therefore

    Kinetic energy of the polar bear (KE) = 23002.1 J

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