WorksheetsQuiz on Stability
Total questions: 15
Worksheet time: 8mins
In which year did Jim Barrowman graduate from the University of Cincinnati?
1960
1965
1970
1975
What is the term for the back and forth motion of a ball returning to its neutral position?
Oscillation
Rotation
Vibration
Translation
What are the two kinds of motion that can be separated in the motion of a rocket?
Linear and Circular
Translational and Rotational
Vertical and Horizontal
Static and Dynamic
What is the effect of rotational forces on a rocket?
They stabilize the rocket
They only affect the rocket when it is balanced
They affect the rotational motion and the C.P. location
They have no effect on the rocket
What is the relationship between the center of gravity (C.G.) and the center of pressure (C.P.)?
They are unrelated
They are the same point
Their interrelation affects model rocket stability
They only affect the rocket's speed
What is the effect of adding more clay to the same spot on a rocket?
It decreases the weight force
It causes the rocket to tip less
It increases the weight force and causes the rocket to tip more
It stabilizes the rocket
What does the new string position represent in Figure 20?
The center of mass
The center of gravity
The center of pressure
The center of rotation
What is the natural axis of rotation for any free body?
Center of mass
Center of pressure
Center of gravity
Center of rotation
What is the center of pressure defined by?
Air pressure forces
Gravitational forces
Rotational forces
Magnetic forces
What happens to the air pressure force behind the C.P. as the angle-of-attack increases?
It increases.
It decreases.
It remains constant.
It disappears.
What does the term "weathercocking" refer to in rocketry?
The rocket's ability to fly straight.
The rocket's tendency to turn into the wind.
The rocket's speed increase.
The rocket's weight distribution.
What is the effect of using a longer than usual launch rod?
More time to build up forward speed
Less time to build up forward speed
Increased weight
Decreased stability
What happens if the cardboard is not stiff enough in the C.L.A. cutout method?
It will give the proper balance point
It will sag and not give the proper balance point
It will increase the rocket's speed
It will decrease the rocket's altitude
What is the initial condition of the rocket when the C.G. is behind the center of pressure (C.P.)?
Stable
Unstable
Neutral
Predictable
What is required for a two-stage vehicle to be stable in free flight?
The C.P. must be ahead of the balance point
The C.G. must be at the nose
The C.P. must be behind the balance point
The C.G. must be at the tail
