the tendency of an object to resist changes in its motion
What is inertia
100
the energy an object has due to its motion
What is kinetic energy
100
the product of mass and velocity
What is momentum
100
the ratio of the circumference of a circle to its diameter
What is pi
200
the energy stored in an object
What is potential energy
200
energy cannot be destroyed, only transferred from one form to another
What is the first law of thermodynamics
200
potential energy formula
What is m x g x h (mass x gravity x height)
200
1/2(I x w^2)
What is kinetic energy
200
when a gravity cruiser comes to a stop because its string is attached to the axle and has been pulled taut
What is abrupt stop
300
extra weight added to the chassis as necessary to keep the cruiser's wheels in contact with the ground
What is ballast
300
the number of times the string can be wound about the drive axle as the weight is lifted to its highest position; they are a function of axle diameter and the distance between the weight's highest and lowest position
What is axle winds
300
circumference
What is the distance around a circle
300
the distance across a circle; measured through its circle
What is diameter
300
coasting stop
What is when gravity cruiser gradually slows to a stop after its string has become completely unwound and its disconnected form the axle
400
drive axle
What is the axle around which the string is wrapped
400
the pivot point around which a lever rotates
What is fulcrum
400
lever
What is a bar that pivots about a fixed point
400
the magnitude of force applied to a rotational system at a distance form the axis of rotation
What is moment arm
400
potential energy
What is the energy stored in an object
500
torque
What is a turning or twisting force
500
an experimental version of a design or a product
What is prototype
500
the process of systematically determining reasons for malfunctions and finding ways to fix them
What is troubleshooting
500
the actual distance a gravity cruiser travels during a trial without extra pushes or other help