Car whose mass is 4.72 103 lb is traveling at a speed of 46 miles per hour What is the kinetic energy of the car in joules?

Answer 1

Check for definition: kinetic-energy

4.72103 lb = 2.14334762 kg

46 miles = 46*1609=74014 meters, and, 1 hour = 3600 seconds

46 mph = 20.5594 meters per second

Energy=(m*v2)/2 = (2.14334762 kg * 20.55942) / 2 = 452.98 joule