The kinetic energy of a 23.2-g object moving at a speed of 81.9 km.hr is ____ kcal.?

2 Answers

  • This is kind of a Physics question.

    81.9km/hr x (1000m/km) x (hr/60min) x (min/60sec)= 22.75m/s

    Kinetic energy=(1/2)mv^2

    Kinetic energy=(1/2)(.0232kg)(22.75m/s)^2= 6.004J

    6.004J x (cal/4.184J) = 1.435cal or 1.43×10^-3kcal

  • 6.00 J

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