Quiz on Stability

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.