Potential Energy
What is potential energy?
Stored energy or energy waiting to be used.
What is kinetic energy?
Energy in motion
What is thermal energy?
the motion of the molecules within an object - heat energy
What is a renewable resource?
a resource that comes back very quickly
Describe energy transformation when lifting an object
The gravitational energy will increase
How does height affect potential energy?
As the height increases, gravitational potential energy also increases.
How is kinetic energy affected by speed?
As the speed increases so does the kinetic energy
How does friction affect thermal energy?
More friction= more thermal energy
Name a non-renewable resource
oil, natural gas, nuclear, coal
Explain energy changes when an object falls?
Starts with potential energy then transforms into kinetic energy
Calculate the potential energy of a rollercoaster at the top of a hill at 6 m and the cart weights 30 kg.
1,764 J
In which scenario would an object have the highest kinetic energy?
a. A heavy truck moving slowly
b. A light car moving at moderate speed
c. A bullet fired from a gun
d. A person walking briskly
C
Explain how thermal energy is produced in a toaster
As you push the button down the thermal energy is increasing the longer the bread is in the toaster, the more thermal energy the toaster has
What is the main advantage of using renewable resources?
They are constantly coming back
What happens to energy when a spring is stretched?
Elastic energy increases
What happens to potential energy if mass is halved?
potential energy is also halved
When is kinetic energy the greatest and WHY?
At the bottom because all of the potential energy has been transferred to kinetic energy
What happens to thermal energy when ice melts?
Thermal energy decreases
How do wind turbines generate energy?
As the turbine spin the kinetic energy is increased to collect the wind to turn into energy
Describe energy transformation in a skate park
Potential energy at the top of the ramp. equal half way and all kinetic at the bottom of the ramp.
Explain why potential energy is important in rollercoasters.
The original potential energy helps the cart transfer to kinetic energy as the cart goes through the track.
Describe an example of kinetic energy in a sports game
answers vary
What happens to the thermal energy in a rollercoaster as friction increases on the ramp?
The thermal energy increases when there is more friction
Explain the impact of fossil fuels9non-renewable energy) on the environment
Pollution
Explain energy transformation in a wind up toy.
Elastic potential to start and when it is released it is being transformed into kinetic energy