NGSS
HS-PS3-2
4 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Physical Science · Chapter 6 · Lesson 3
Friction does not destroy energy. It relocates it.
Physics · Chapter 4 · Lesson 3
Nothing is lost, including to friction.
Physics · Chapter 4 · Lesson 5
Storing energy in a shape.
Honors Physics · Chapter 4 · Lesson 2
Conservative and Non-Conservative Forces
Some forces give it back, and some do not.