Kinetic Energy
Does a 5kg box have kinetic energy when it is sitting still at the top of a hill?
no
Does a 5kg box have potential energy when it is sitting still at the top of a hill?
yes
Fill in the blank: Energy can _______ be created or destroyed.
never/not
What happens to the kinetic energy of a ball as it is falling?
the kinetic energy increases
What happens to the potential energy of a ball as it is falling?
the potential energy decreases
What can energy do instead of being created or destroyed?
energy can transfer/change into a different form of energy
What 2 factors determine the amount of kinetic energy in an object? (must have both to be correct)
mass and velocity
What 3 factors determine the amount of potential energy in an object? (must have all three to be correct)
mass, gravity, and height
Where does the potential energy go as a ball is rolling down a hill?
The potential energy turns into kinetic energy
What is kinetic energy?
moving energy
What is potential energy?
Stored energy due to position
If a skateboarder at the top of a hill has 10 Joules (J) of potential energy, how much kinetic energy do they have by the time they reach the bottom of the hill?
10 Joules (J) of kinetic energy
What is the equation for kinetic energy?
KE = 1/2 m v2
What is the equation for potential energy?
PE = m g h
If a ball loses 5 Joules of potential energy for every step it falls down, how much kinetic energy has it gained after falling down 4 steps?
20 Joules (J) of kinetic energy