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16 December, 13:09

1. What is the Kinetic energy of a 1500 kg car going at a speed of 14 meters/second?

Show your work below

2. What is the KE if m = 2 and v = 5?

3. What is the KE if m = 4 and v = 5?

4. What is the KE if m = 2 and v = 10?

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Answers (1)
  1. 16 December, 13:24
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    Kinetic energy is 147000 Kgm/sec^2 or joules

    Kinetic energy is 25 kgm/sec^2 or joules

    Kinetic energy is 50 kgm/sec^2 or joules

    Kinetic energy is 100 kgm/sec^2 or joules

    Step-by-step explanation:

    We know that KE = 1/2mv^2

    where KE is kinetic energy, m is mass in kg and v is velocity meter/sec.

    In first case,

    m=1500 kg, v = 14 m/sec or joules

    KE = 1/2 * 1500*14*14

    =147000 Kgm/sec^2

    In second case,

    m=2 Kg, v = 5 m/sec

    KE = I/2 * 2*5*5

    = 25 kgm/sec^2 or joules

    in third case,

    m=4 kg, v=5 m/sec

    KE = 1/2*4*5*5

    = 50 Kgm/sec^2 or joules

    in fourth case,

    m = 2 kg, v = 10 m/sec

    KE = 1/2*2*10*10

    =100 kgm/sec^2 or joules
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