Energy
Energy cannot be _______________ or _______________
Created or Destroyed
A 1,400 kg car is travelling at 50 m/s, what is its kinetic energy?
1,750,000 J
What are the variables that determine potential energy?
mass and height
What is the maximum jumping height of a pole vaulter who weighs 45 kg and is running at a speed of 15 m/s?
11.5 m
Hot dog
Chemical Potential
Something that is in motion has __________ energy.
Kinetic
A girl is riding her bike at a velocity of 15 m/s. Her bike and herself weigh 60 kg. What is her kinetic energy?
6,750 J
What is the potential energy of a ball held 3 m in the air with a weight of 8 kg.
235.2 J
A truck is stopped at the top of a 66 m hill. How fast will it be moving when it reaches the bottom?
36.0 m/s
Stretching a hair band
Elastic Potential
Which is not a type of potential energy?
Electrical Mechanical Nuclear Chemical
Mechanical.
A dog with a mass of 25 kg has a kinetic energy of 33 J. What is the dog's velocity?
1.6 m/s
At what height is a bird sitting if it weighs 2 kg and has a potential energy of 87 J.
4.4 m
A ball is thrown straight up in the air at 34 m/s, how high will the ball go?
59.0 m
A running vacuum
Electrical Kinetic
A pool ball hitting another pool ball ____________ its energy
transfers
A car has a velocity of 65 m/s and a kinetic energy of 143,000 J, what is its mass?
67.7 kg
What is the mass of a ball sitting on ledge 20 m above the ground with a potential energy of 1,300 J?
6.6 kg
A rock on the edge of a 98 m cliff falls off. What is its velocity as it falls?
43.8 m/s
Blasting music
Sound Kinetic
Potential energy can only be _____________.
Transformed
A bird has a mass of 9 kg and a kinetic energy of 1.6 x 104 J, what is its velocity?
59.6 m/s
What is the potential energy of an ant with a mass of 3.2 x 10-2 kg sitting on a railing 1.0 m above the ground?
0.3 J
What is the kinetic energy of a 5 kg bird flying at a height of 17 m?
V = 18.3 m/s
Ek = 833 J
Magnetic potential