- #1
Karol
- 1,380
- 22
Homework Statement
A 1000 kg mass car is driving at 3 [m/sec], how many kcal develop in the brakes till full stop
Homework Equations
Kinetic energy: [itex]E=\frac{1}{2}mv^2[/itex]
Energetic equivalent of a kcal: 4186 [joule]
The Attempt at a Solution
##E=\frac{1}{2}1000\cdot 9=4500[joule]##
##\frac{4500}{4186}=1.07[kcal]##
It should be 1000 times bigger, 1,075[kcal]