Work
This is the amount of force applied over a certain distance or Blank = Force x distance
What is Work
What two ways can you change your power?
Increase work, decrease time
Name 2 types of Potential energy
Chemical, elastic, gravitational, nuclear
Kinetic energy is when an object is ________.
Moving
This states that energy cannot be created or destroyed, it can only be transferred or change forms.
What is Energy Conservation
If I hold a bowling ball over my head 3 meters high, how much work am I doing?
None!
This is the unit that power is measured in blank.
What is Watts
Potential energy is energy that is ________.
Stored
What is the equation for kinetic energy?
KE = 1/2 m v^2
This type of energy increases when there is friction.
What is Thermal/Heat Energy
What work is done if you push a 200 N object 10 meters?
2000 J
What is the power of an object that has done 80 J of work in 8 seconds?
10 Watts
What is the potential energy of a 5 N object 2 feet in the air?
10 J
What is the kinetic energy of a 100 kg elephant that is walking 2 m/s2?
200 J
An object falls from a height h with 0 air resistance. The object is at one half (1/2) its original height. The potential energy converted to what type of energy? Draw the energy pie charts for it.
What is Kinetic Energy gained.
If you walk up a flight of stairs and then run up the same flight of stairs, when are you doing more work?
Neither, they are the same
What two things does power rely on?
Time and Work
What is the potential energy of an object that is 80 meters in the air and weighs 5 kg?
3920 J
A pendulum is swinging back and forth. As the pendulum moves from its lowest point to its highest point, its energy transfers from Kinetic Energy to this type of energy.
What is Potential Energy
What type of energy is used when you eat food?
Chemical energy
If the mass of an object is 5 kg and it is accelerating at 2 m/s2 and it travels 10 meters, how much work is it doing?
100 J
If I do 2000 Joules of work in 5 seconds, I produce this amount of power.
What is 400 watts.
An object moves down a ramp without friction. The object loses potential energy and gains this type of energy.
What is Kinetic Energy.
A toy car that weighs 2 kg is accelerating at 50 m/s2. What is the kinetic energy?
2500 J
Why do perpetual motion machines not exist?
Friction