1. 1. A 6 kg cat is running 4 m/s. What is the energy?
KE = 0.5 m v2
PE = m g h
1. A 6 kg cat is running 4 m/s. What is the energy?
m = 6 kg
v = 4 m/s
KE = 0.5 (6 kg) (4m/s)2
KE = 0.5 (6 kg) (16 m/s2)
KE = 48 J

2. 2. A 6 kg cat is sitting 3 m high on a shelf. What is the energy?
KE = 0.5 m v2
PE = m g h
2. A 6 kg cat is sitting 3 m high on a shelf. What is the energy?
m = 6 kg
h = 3 m
PE = (6 kg) g (3m)
PE = (6 kg) (9.8m/s2) (3m)
PE = J

3. ME = KE + PE ME = KE + PE ME = (19 J) (11 J) ME = 30 J
3. A cat is jumping down a shelf. It has 11 J of potential energy and 19 J of kinetic energy. What is the mechanical energy?
ME = KE + PE
ME = (19 J) (11 J)
ME = 30 J

4. ME = KE + PE ME = KE + PE (40 J) = (19 J) + PE (-19 J) (-19 J)
4. A cat is jumping down a shelf. It has 40 J of mechanical energy and 19 J of kinetic energy. What is the potential energy?
ME = KE + PE
(40 J) = (19 J) + PE
(-19 J) (-19 J)
ME = 21 J

5. Please review your quiz
Please review your quiz. On a separate sheet of paper, rewrite the questions you missed and find the correct answers.