Center of Mass
Practice Problems
Definitions
Case Studies
Mystery Questions
100
The Center of Mass position is scaler.
True or False
What is "True"?
100
Objects with a smaller inertia move _____ , while objects with a large inertia move _______
What is Fast, Slow?
100
____ is the rotational equivalent of force.
What is Torque?
100
The ____ effect that causes motion due to low surface tension
What is the Marangoni Effect?
100
All bodies have the same moments of inertia. True or False
What is False?
200
This is where the center of mass of a high jumper would be as they jump over the bar.
Where is below the bar?
200
This will always be the fastest to hit the floor:
A solid cylinder or A hollow Cylinder.
What is a solid cylinder?
200
This is the direction in which an object will fly off of a point in an object moving in a rotational motion.
What is tangential motion?
200
These two products were used in the study to create a propellant force?
What are Dawn soap and Isopropyl Alcohol?
200
This is the difference between circular and rotational motion.
What is in circular motion, the objects move in a circular pattern, while in rotational motion the objects are on a fixed axis?
300
This must be done to rebalance a scale after its fulcrum (center point) has been shifted to the left.
What is adding more mass to the left?
300
If a solid sphere, disc and cylinder are allowed to roll down an inclined plane from the same height.
What is a Solid sphere?
300
This means “center-seeking”
What is “centripetal”?
300
This causes the Marangoni Effect/propellant force?
What is Induced Low Surface Tension?
300
This formula describes which relationship between mass and position.
What is Center of Mass?
400
Doing this to an object allows the center of mass of an object to be found.
What is spinning it?
400
This is represented by the red lines in this figure.
What is the direction of Velocity in Rotational Motion?
400
This always has unchanging shape and size
What is a Rigid body?
400
This is the moment at which the disk stops translationally and moves into a rotational motion.
What is when the disk drops its vortices and decelerates?
400
This type of momentum can be seen when a half-filled water bottle is tossed into the air and lands on the bottom right side up.
What is Angular Momentum?
500
Three identical particles are all moving at the same speed in space. This can be said about the center of mass for all three particles relative to velocity.
What is the center of mass is moving at the same velocity as each particle?
500
This is represented by the blue lines in this figure.
What is the direction of Acceleration in rotational motion?
500
Centripetal motion changes this instead of magnitude
What is the Direction of Velocity?
500
This is what causes the rotational motion.
What is Unbalanced torque?
500
Torque is a ____ and ____ force.
What is "Rotational and twisting"?