You have a rubber band pulled back as far as it will go. Does the rubber band have more potential energy or more kinetic energy?
What is potential energy? Elastic Potential Energy to be exact. This is energy that is stored by compressing or stretching an object.
100
Daily Double
A combination of two or more simple machines.
What is a compound machine?
100
A force applied through a distance.
What is Work?
100
Friction causes which type of energy
A) Thermal
B) Nucleur
C) Kinetic
D) Potential
What is Thermal?
100
A box is pushed with a force of 50 N and moves a distance of 10 m across the floor. How much WORK is done in moving the box?
What is 500 Joules?
200
Daily Double
True or False
Energy can be transferred from one place to another.
What is True.
Food to energy storage, sun to earth, electricity from the power plant to our homes.
200
Give at least 3 of the simple machines we talked about.
Lever, Pulley, Wheel and Axle, Wedge, inclined plane, and screw
200
A device that changes the force or increases the motion from work.
What is a machine?
200
Which cannot be done by a machine?
A) Increase force
B) increase Work
C) Change direction of a force
D) increase velocity
What is B?
200
Daily Double
How much work do you do when you lift a 60 N metal bar 3.5 M ?
What is 210 Joules?
300
What can you apply to a machine to make its' efficiency increase?
What is a lubricant?
300
The muscles of a runner transform chemical potential energy into _________ energy.
What is Kinetic Energy?
300
A machine that does work with only one movement of the machine.
What is a simple machine?
300
What is the SI unit of measurement for mass?
What is Kg?
300
You put in 20 Joules of work to move a metal storage container up a ramp. If the output work using the inclined plane is 220 Joules, then what is the EFFICIENCY of the inclined plane?
What is 1100 % OR 11 times more efficient?
400
Anything around which you can imagine a boundary.
What is a system?
400
This force always opposes gravity.
What is Air Resistance?
400
Daily Double
The ability to cause change or do work.
What is energy?
400
What is the SI unit of measurement for Temperature?
What is Kelvin?
400
A sprinter with a mass of 60 kg is moving forward at a speed of 8 m/s. What is the jogger's KINETIC ENERGY from this forward motion?
What is 240 Joules?
500
A baseball is being held in someones hand. At that point the ball has 210 Joules of potential energy. If the ball is then thrown, at its highest level of velocity what is the baseball's level of kinetic energy? ___________ Joules
What is 210 joules?
500
The energy due to compressing a spring.
What is Potential Energy?
500
The ratio of output work to input work. This is measure in percent.
What is efficiency?
500
What is the earth's natural gravitational force?
What is 9.8?
500
A baseball with a mass of 1.5 kg is moving at a speed of 20 m/s. What is the baseball's KINETIC ENERGY from this motion?