Sunday, November 10, 2019

College Algebra, Chapter 2, Review Exercises, Section Review Exercises, Problem 62

According to Physics, the Kinetic Energy E of a moving object is joining proportional to the objects mass m and the square of its speed ν. A rock with mass 10kg that is moving and 6ms has a kinetic energy of 180 Joules. What is the kinetic energy of a car with mass 1700 kg that is moving at 30ms

E=kmν2Model180 Joules=k(10kg)(6ms)2Solve for kk=180 Joules(10kg)(6ms)2

Thus, when m=1700 kg and ν=30ms

E=180 Joules(10kg)(6ms)2(1700kg)(30ms)E=765,000 Joules

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