AllyStrad
Answered

Welcome to Westonci.ca, your ultimate destination for finding answers to a wide range of questions from experts. Discover comprehensive answers to your questions from knowledgeable professionals on our user-friendly platform. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.

Two railroad cars,each of mass 7650 kg and traveling 95 km/h in opposite directions, collide head-on and come to rest. How much thermal energy is produced in this collision?

Sagot :

AL2006
Kinetic energy = (1/2) (mass) (speed²)

The mass of each car is 7,650 kg.

The speed of each car is (95 km/hr) x (1,000m/km) x (1 hr/3,600 sec)
               = 26.3889 meters/sec

Kinetic energy of each car = (1/2) (7,650) (26.3889)² = 2,663,628 joules

Total kinetic energy of both cars = double that number = 5,327,256 joules

That's the total energy dissipated in the crash.  We can't tell how much of it is thermal energy, and how much of it is dissipated in other ways, like tearing up the rails, bending and twisting the cars and ripping them to shreds, and sending pieces flying in every direction.
Visit us again for up-to-date and reliable answers. We're always ready to assist you with your informational needs. We hope our answers were useful. Return anytime for more information and answers to any other questions you have. Thank you for choosing Westonci.ca as your information source. We look forward to your next visit.