What is the kinetic energy of an automobile?
Ray asked:
a)What is the kinetic energy of an automobile with a mass of 1258 kg traveling at a speed of 10 m/s? Answer in units of J.
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a)What is the kinetic energy of an automobile with a mass of 1258 kg traveling at a speed of 10 m/s? Answer in units of J.
b) What speed would a fly with a mass of0.559 g need in order to have the same kinetic energy as the automobile? Answer in units of m/s.
February 16th, 2010 at 10:13 am
a) kinetic energy K = 0.5 * Mass * velocity^2
K = 0.5 * 1258 * 10 = 6290 J
b) Better to convert the mass from grams to kilograms
M= 0.559 g = 0.559 /1000 = 0.000559 kg
K = 0.5 M V^2
V^2 = K / 0.5M = 22504472.2719 m/s Saad Eddin A