I Know Potential and Kinetic
What's the Speed?
Simple Machines: Inclined Planes
Thermal Energy
Energy Transformations
100
Stored energy or energy of position
What is Potential energy?
100
Speed is defined as the motion over distance, in a given period of time. The formula for speed is Speed= ______________ / (divided by) ______________
What is Distance / Time?
100
As an object slides down the ramp, also known as an inclined plane, this force acts upon the object
What is friction?
100
The transfer of energy through space. Takes place with no direct contact between a heat source and an object. A campfire is an example of this.
What is radiation?
100
Solar panels harness ______________energy to _____________ energy.
What is solar (radiant) energy to electrical energy?
200
A roller coaster at the top of the first big hill has potential energy. The roller coaster plummets down the first hill and at the bottom of that first hill the roller coaster has kinetic energy. As the roller coaster travels up the second hill what type of energy is increasing?
What is Potential energy?
200
A Mouse Trap Car (MTC) traveled 25 meters in 2 seconds. The average speed of the MTC is (explain how you arrive at your answer)
What is 12.5 m/s. Use the formula for average speed: Final Distance - Initial Distance 25 meters - 0 meters ----------------------------------- ----------------------- Final Time - Initial Time 2 seconds - 0 seconds 25 meters ----------- 2 seconds = 12.5 meters/second
200
When using an inclined plane, the mechanical advantage becomes greater by (increasing/decreasing) the length of the inclined plane.
What is increasing?
200
Heat transfer within a material or between materials that are touching. A spoon in a pot of hot soup heats up by this.
What is conduction?
200
Non-polluting windmills transform _________________ energy into __________________ energy.
What is mechanical energy into electrical energy?
300
You've got to move it move it
What is Kinetic energy?
300
Graphing motion: A straight line with a positive upward slope indicates a _________________ speed. A curved upward line means positive __________________.
What is constant speed, acceleration.
300
The simple machine that increases the distance a load travels and reduces the force needed is: a. pulley b. wedge c. inclined plane d. screw
What is c. inclined plane
300
Heat transfer by the movement of currents in a fluid. Heated particles of the fluid begin to flow. This flow transfers from one part of the fluid to another. The soup in a pot is heated in this way.
What is convection?
300
Plugging in a curling iron is an example of ____________ energy being transformed into _________________ energy.
What is electrical energy being transformed into thermal energy?
400
When Kinetic energy is at its greatest, _____________ energy is at its lowest. The reverse can also be said when ______________ energy is at its greatest, Kinetic energy is at its lowest. (Hint: Think roller coaster)
What is Potential energy, Potential energy?
400
True or False: A straight line indicates no motion but time continues.
What is false? A straight line indicates a constant speed. A horizontal flat, straight line indicates no motion.
400
Simple machines can change the amount or ___________ of a force. (Hint: think movable pulley)
What is direction?
400
Ice cubes gain this when they melt in a mug of coffee
What is thermal energy?
400
A musician playing an instrument converts _____________ energy in the person's body to _____________ energy when he plays the instrument.
What is chemical energy to mechanical energy?
500
A battery operating a remote control car is an example of _____________ energy tranformed to _____________ energy. (Hint: Car is not moving, then car is moving)
What is Potential energy to Kinetic energy?
500
An object at a constant speed has (balanced/unbalanced) forces acting on it.
What is balanced?
500
This must occur in order for work to be done on an object
What is a force, such as a push or a pull, must be applied over a distance?
500
When heating a pot of water on stove the heat transfer that is taking place within the pot results in hot water near the bottom and cooler water near the top
What is convection?
500
Geothermal energy uses heat from deep inside the Earth to heat water, the water is pumped to the surface, the pressure is dropped, which causes the water to turn into steam. The steam spins a turbine, which is connected to a generator that produces electricity. An advantage to Geothermal energy is no fuel is burned to heat the water but a disadvantage is not many places on Earth have access to Geothermal energy. The three step energy transformation is .
What is thermal energy to mechanical energy to electrical energy?
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