What is the kinetic energy of a bicylcle with a mass of 15 kg traveling at a velocity of 3 m/s?​

Question

What is the kinetic energy of a bicylcle with a mass of 15 kg traveling at a velocity of 3 m/s?​

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Thanh Thu 3 years 2021-09-05T04:41:16+00:00 2 Answers 14 views 0

Answers ( )

  1. haidang
    0
    2021-09-05T04:42:27+00:00
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    KE = 0.5 x mv^2

    Kinetic energy equals 1/2 times mass times velocity squared.

    Mass = 15kg

    Velocity = 3m/s

    Plug it into the formula.

    KE = 0.5 x 15(3^2)

    KE = 0.5 x 15(9)

    Multiply the mass and velocity squared.

    KE = 0.5 x 135

    Then, multiply the result by 1/2 or 0.5

    KE = 67.5

    The kinetic energy of a bicycle that has a mass of 15kg and travels at 3m/s is 67.5J.

  2. bonexptip
    0
    2021-09-05T04:42:39+00:00
    Reply

    Answer:

    67.5 J

    Explanation:

    Kinetic energy can be found using the following formula.

    KE=\frac{1}{2}mv^2

    where m is the mass in kilograms and v is the velocity in m/s.

    We know the bike has a mass of 15 kilograms. We also know the velocity is 3 m/s. Therefore, we can substitute 15 for m and 3 for v

    KE=\frac{1}{2}*15*3^2

    Evaluate the exponent first. 3^2 is the same as 3*3, which is equal to 9.

    KE=\frac{1}{2} *15*9

    Multiply 15 and 9.

    KE=\frac{1}{2} *135

    Multiply 1/2 and 135

    KE=67.5

    Add appropriate units. Kinetic energy uses Joules or J as the units.

    KE= 67.5 Joules

    The kinetic energy of the bike is 67.5 Joules

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