Ariel G.
asked • 03/02/20A 1643 kg car is traveling down the road at 88.2 km / h. While traveling at this rate of speed, what is the kinetic energy of this vehicle in kilojoules?
More
1 Expert Answer
Sidney P. answered • 03/03/20
Tutor
4.9
(1,532)
Astronomy, Physics, Chemistry, and Math Tutor
Kinetic energy KE = 1/2 mv2, but to get Joules and then kilojoules, convert km/h to m/s:
88.2 km/h * (1000 m/1 km) * (1 h/3600 s) = 24.5 m/s.
Then KE = (1643/2) * (24.5)2 = 493,100 J = 493.1 kilojoules.
Still looking for help? Get the right answer, fast.
Ask a question for free
Get a free answer to a quick problem.
Most questions answered within 4 hours.
OR
Find an Online Tutor Now
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.
Stanton D.
Hi Ariel G., as you solve, remember that wheels have a special relationship of mass to kinetic energy, up to twice what the translational speed of the can would suggest. So that you would note as an additive correction, using wheel mass, and (effective multiplication factor - 1) (minus one, because you already calculated in the translational kinetic energy of the wheels in your main calculation!). -- Cheers, -- Mr. d.03/03/20