Potential and Kinetic Energy
What is the definition of Potential Energy
Stored Energy
What is the sum of all the potential and kinetic energy is the particles of an object?
Thermal Energy
What is the law of conservation of energy?
Energy cannot be created or destroyed it can only change forms.
What is the formula for Work?
W=fd
What unit is energy measured in?
Joules (J)
When an object is at the top of a hill what type of energy does it have the most of?
Potential/Gravitational Potential
What happens to the thermal energy of a substance when temperature is increased?
It increases
If a roller coaster moves downhill how does its energy change?
Potential energy is converted to Kinetic.
What is the formula for power?
P=w/t
If an object has a mass of 10kg and is lifted 5m off the gorund, What is its gravitational potential energy?
490 J
What happens to an objects potential energy as it falls to the ground?
It decreases as its converted to Kinetic
Explain the flow of thermal energy.
Flows from high temperature to Low temperature
How do you calculate Mechanical Energy?
PE+KE=ME
If a person lifts a box with a force of 20N over a distance of 5 meters, how much work is done?
100 J
How much kinetic energy does a 1000kg car traveling at 10m/s possess?
50,000 J
If a car is moving at a constant speed what type of energy does it primarily have?
Kinetic
What is the transfer of thermal energy using the movement of heated fluids?
Convection
As potential energy converts to Kinetic Energy and Vice Versa, how does Mechanical Energy Change?
Mechanical Energy Remains Constant.
If a light bulb uses 60 J of energy every 2 seconds, What is the power of the light bulb?
30 W
If a 2000 kg car accelerates from rest to 20 m/s, How much kinetic energy does the car have at that speed?
400,000 J
A rock is placed on the edge of a cliff. If the rock falls explain how its potential energy changes.
As it falls potential energy is converted to kinetic energy.
What is the transfer of energy due to the direct contact of particles?
Conduction
What are the formulas for Potential and Kinetic Energy
PE = ham
KE=1/2mv2
If an object is moved using 30 N over 15 m in a span of 12 s, what power is being applied to the object?
37.5 W
If a machine has a mechanical advantage of 8, and an input force of 50N, what is the output force?
400 N