A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
A 30 kg child and sled slides down a 9.0 meter high hill. It is going a speed 12 m/s at the bottom of the hill. How much mechanical energy was transformed into thermal energy?
A 360 J
B 490 J
C 2160 J
D 2646 J
 2 years ago
A 30 kg child and sled slides down a 9.0 meter high hill. It is going a speed 12 m/s at the bottom of the hill. How much mechanical energy was transformed into thermal energy? A 360 J B 490 J C 2160 J D 2646 J

This Question is Closed

cesckay
 2 years ago
Best ResponseYou've already chosen the best response.1as the sleigh goes down, gravitational potential energy is converted to kinetic energy. hence if you find potential energy  kinetic energy, ur answer should be right about 490

natasha.aries
 2 years ago
Best ResponseYou've already chosen the best response.0how do u know u subtract?

cesckay
 2 years ago
Best ResponseYou've already chosen the best response.1Energy transferred( P.E) = work done ( K. E.) + heat energy.. potential energy is converted (transferred) to kinetic energy as the sleigh glides down the slope.. there must be some kind of friction opposing the motion but it is negligible i suppose. As it slides down, kinetic energy is increasing because its gaining velocity. hence the lossed energy is converted to heat since energy cannot be created or destroyed. Law of conservation of energy

natasha.aries
 2 years ago
Best ResponseYou've already chosen the best response.0ohhh okay i think i get it lol
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.