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.
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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?