11th Grade ATC Lesson. Tuesday Jan. 17, 2012. Instructions. Students: Write the notes shown on next slide. Use your notes to write and answer the questions that follow. Don’t forget to turn in your work to your science teacher!. Energy.
Tuesday Jan. 17, 2012
There are two types of energy:
Kinetic Energy = ½ x mass x speed²
KE = ½mv²
Gravitational potential energy = mass x gravitational acceleration x height
GPE = mgh
(a)1, 2, 3 (b) 2, 1, 3 (c) 3, 2, 1
(d) All three balls strike the ground at the same speed.
2. Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her descent down a frictionless slide. If they both start at the same height above the ground, which of the following is true about their kinetic energies as they reach the ground?