Vocabulary
this word means capacity of work, change, or force; some examples are potential and kinetic
ENERGY
In physics, ______ is the energy transferred to or from an object via the application of force along a displacement.
Work
What is the mechanical energy of an object that has 500J of Potential energy and 1500J of kinetic energy
2000J
Energy can not be lost or destroyed, only _______ into a different form of energy
changed/converted
What type of energy is found in food
Chemical Energy
Energy used to move something
Work
Rate at which work is done
Power
Calculate the potential energy of a 20kg rock sitting on a 50m cliff. (g=9.8m/s2)
9,800 J
As a golfball gains height off a tee, what type of energy does it gain?
Potential Energy
What type of energy comes from the sun
Radiant Energy
Energy of motion
Kinetic energy
Calculate the work done by moving a 60N object 3m.
180 J
Calculate the kinetic energy of a 60kg man running 5m/s.
750 J
Give an example of gravitational potential energy transforming to kinetic energy
an object falling off a shelf
dropping a rock
rollercoaster gaining speed as it goes down a hill
etc
Potential energy doubles
Energy of position
Potential Energy
Calculate the power when an engine consumes 6000J of work every 30 seconds.
200 Watts
Calculate the potential energy of a 10kg bowling ball sitting on a 2m shelf. (g=9.8m/s2)
1,960 J
Give an example of kinetic energy changing to potential energy
a car losing speed as it goes up a bridge
a golf ball losing speed as it gets higher in the air
etc
What does an objects potential energy on earth depend on?
Position or height
The process by which energy is relocated from one system to another
Transferred energy
What is the Force used if it takes 1200J of work to move an object 20m
60N
Calculate the kinetic energy of a 6kg toy car traveling 10 m/s.
300 J
What type of energy stays constant throughout a closed system (assuming no friction)
Mechanical energy
What is the most important variable to kinetic energy
Velocity