Cups!
What is thermal energy?
Heat
What is kinetic energy?
Energy of motion
What is potential energy?
Energy that is stored
Does TOTAL energy increase, decrease, or stay the same on a roller coaster?
Stays the same
What are the 3 types of thermal energy transfer?
Conduction, convection & radiation
If a ping pong ball and a bowling ball are moving at the same speed, which has more kinetic energy?
Bowling ball
What is gravitational potential energy?
Energy stored because of height above the ground
What happens to potential energy as a roller coaster falls down the first hill?
It transforms into kinetic energy.
Which type of thermal energy transfer does not involve particles?
Radiation
An equal weight blue car and red car are traveling on the highway. The red car is moving at 40mph and the blue car is moving at 50 mph. Which has more kinetic energy?
The blue car
What 2 factors affect the gravitational potential energy of an object?
Its height and mass
Why does a ball slow down as it rolls up a hill?
Describe how energy is transferred through conduction.
Particles collide and transfer energy to one another
What 2 factors affect the kinetic energy of an object?
speed and mass
It increased (doubles)
At what point does a falling pencil have its maximum kinetic energy?
Just before it hits the ground
How does convection relate to density?
Fluid become less dense as they rise and create a cycle.
KE= 1/2*mass*speed^2
What is the kinetic energy of a 3 kilogram object moving at 2 m/s?
6 Joules
PE=10*mass*height
What is the potential energy of a 5 kilogram object that is 2 m off the ground?
100 J
A sled on a hill starts with 100 Joules of PE and 0 Joules of KE. As it moves down the hill and has 45 J of KE, how much PE does it have?
55J