Units
Work
Joule (Nm)
Tyler (mass=50-kg) is riding a skateboard down the street. What is Tyler’s kinetic energy if he travels at 2 m/s?
100 J
Greater mass gives (more/less) Kinetic Energy
more
Energy
Joule
A 0.10 kg bird is flying at a constant speed of 8m/s. what is the bird’s kinetic energy?
3.2 J
What type of potential energy is related to height above Earth's surface?
Gravitational
The constant for gravity is?
9.8 m/s2
You exert a vertical force of 72 Newtons to lift a box a height of 1 meter in a time of 2 seconds. How much power is used to lift the box?
36 W
Energy of the atom's nucleus is called? This includes fission and fusion
Nuclear
__________ is equal to about 746 watts; another common unit of power
Horsepower
What is the potential energy of a 20kg rock at the edge of a cliff, which is 20m above the ground?
3920 J
Energy that flows from higher temperatures to lower temperatures is called _______.
Heat
1 J = ?
1 Nm
Sean stands on the roof of the school holding his egg drop project, 12 m above the ground. If his device has a mass of 0.5 kg, calculate the potential energy of his device.
58.8 J
Do solids, liquids, or gases conduct better?
Solids