ORBITAL MECHANICS FOR ENGINEERING
STUDENTS COMPREHENSIVE EXAM
QUESTIONS AND CORRECT ANSWERS
STUDY GUIDE
●● What is the study of motion with reference to the force which causes
the motion?
Answer: Dynamics
●● What does an impulse cause?
Answer: The object's momentum to change
●● What is momentum related to?
Answer: The object's motion and mass
●● What is centrifugal force directly proportional to?
Answer: The square of the tangential velocity
●● What is the measure of resistance to change in angular velocity
known as?
Answer: Moment of inertia
, ●● What is the point about which the product of the mass and moment
arm sums up to zero?
Answer: Center of gravity
●● What do you call the point through which the resultant of the
distributed gravity force passes?
Answer: Center of mass
●● If an object exerts a normal force on a surface, what is true about its
normal force?
Answer: It is equal to the weight of the object
●● What is the limiting amount of resistance to sliding between two
bodies called?
Answer: Friction
●● What is the moment of inertia of a circle of radius r?
Answer: πr^4/4
●● What is the mass moment of inertia of a sphere of mass m and radius
r?
Answer: 2/5 mr²
STUDENTS COMPREHENSIVE EXAM
QUESTIONS AND CORRECT ANSWERS
STUDY GUIDE
●● What is the study of motion with reference to the force which causes
the motion?
Answer: Dynamics
●● What does an impulse cause?
Answer: The object's momentum to change
●● What is momentum related to?
Answer: The object's motion and mass
●● What is centrifugal force directly proportional to?
Answer: The square of the tangential velocity
●● What is the measure of resistance to change in angular velocity
known as?
Answer: Moment of inertia
, ●● What is the point about which the product of the mass and moment
arm sums up to zero?
Answer: Center of gravity
●● What do you call the point through which the resultant of the
distributed gravity force passes?
Answer: Center of mass
●● If an object exerts a normal force on a surface, what is true about its
normal force?
Answer: It is equal to the weight of the object
●● What is the limiting amount of resistance to sliding between two
bodies called?
Answer: Friction
●● What is the moment of inertia of a circle of radius r?
Answer: πr^4/4
●● What is the mass moment of inertia of a sphere of mass m and radius
r?
Answer: 2/5 mr²