Biomechanics Final Exam Review Questions
with Verified Answers
What variable may be described as the "The quantity of motion" possessed by an object? - Answer
Momentum
What happens to momentum when an impulse is applied to a system? - Answer Momentum is changed
In the human body, most of the lever systems formed by muscles applying forces to bones are what
class? - Answer 3rd Class
What are the "Units" of Force? - Answer (kg*m)/S^2
What are the "Units" of Linear Momentum? - Answer (kg*m)/S
What are the "Units" of Power? - Answer (N*m)/S
What are the "Units" of Moment of inertia? - Answer kg*m^2
With specific regard to Biomechanics, Kinetics can be defined as the branch of dynamics that involves
the study of ________ acting on the human body, and the effects of those ____________. - Answer
"Forces", "Forces"
The effect of a force is determined by its __________, ___________, and __________. - Answer
"Magnitude", "Direction", "Point of Application"
Work done on a body by a force is the product of the __________ and the ___________ of the body in
the direction of the force. - Answer "Force magnitude", "Displacement"
If an object is not of uniform density, then the ___________ will be shifted toward the area of greater
density. - Answer "Center of Mass"
, What is Inertia? - Answer - Resistance to being accelerated
What is Force? - Answer - Any interaction between two objects that tends to cause an acceleration
(Vector quantity)
What is Newton's 1st Law? - Answer -(Law of Inertia) A body will maintain a constant state of motion,
unless acted on by an external force that changes the state of motion.
( A body at rest will tend to stay at rest)
What is Newton's 2nd Law? - Answer - (Law of Acceleration) A force (F) applied to a body causes and
acceleration of that body, with a magnitude proportional to the force, in the direction of the force, and
inversely proportional to the mass of the body. (F = M*A)
What is Newton's 3rd Law? - Answer - (Law of Reaction) For every action, there is an equal and opposite
reaction.
What is Ground Reaction Force (GRF)? - Answer - GRF is the reaction to the push applied to the ground
by the runner
- GRF reflects the acceleration of the total body CM: all body segments contribute to the total body
acceleration in proportion to their own mass and acceleration.
What is Newton's Law of Gravitation? - Answer - All bodies are attracted to one another with a force
proportional to the product of the masses and inversely proportional to the square of the distance
between them.
What is a Static System? - Answer - A static system is one that is at rest, or moving at constant velocity.
In other words, zero acceleration.
What is a dynamic system? - Answer - A dynamic system is one where the velocity is changing over time.
In other words, acceleration is not zero.
with Verified Answers
What variable may be described as the "The quantity of motion" possessed by an object? - Answer
Momentum
What happens to momentum when an impulse is applied to a system? - Answer Momentum is changed
In the human body, most of the lever systems formed by muscles applying forces to bones are what
class? - Answer 3rd Class
What are the "Units" of Force? - Answer (kg*m)/S^2
What are the "Units" of Linear Momentum? - Answer (kg*m)/S
What are the "Units" of Power? - Answer (N*m)/S
What are the "Units" of Moment of inertia? - Answer kg*m^2
With specific regard to Biomechanics, Kinetics can be defined as the branch of dynamics that involves
the study of ________ acting on the human body, and the effects of those ____________. - Answer
"Forces", "Forces"
The effect of a force is determined by its __________, ___________, and __________. - Answer
"Magnitude", "Direction", "Point of Application"
Work done on a body by a force is the product of the __________ and the ___________ of the body in
the direction of the force. - Answer "Force magnitude", "Displacement"
If an object is not of uniform density, then the ___________ will be shifted toward the area of greater
density. - Answer "Center of Mass"
, What is Inertia? - Answer - Resistance to being accelerated
What is Force? - Answer - Any interaction between two objects that tends to cause an acceleration
(Vector quantity)
What is Newton's 1st Law? - Answer -(Law of Inertia) A body will maintain a constant state of motion,
unless acted on by an external force that changes the state of motion.
( A body at rest will tend to stay at rest)
What is Newton's 2nd Law? - Answer - (Law of Acceleration) A force (F) applied to a body causes and
acceleration of that body, with a magnitude proportional to the force, in the direction of the force, and
inversely proportional to the mass of the body. (F = M*A)
What is Newton's 3rd Law? - Answer - (Law of Reaction) For every action, there is an equal and opposite
reaction.
What is Ground Reaction Force (GRF)? - Answer - GRF is the reaction to the push applied to the ground
by the runner
- GRF reflects the acceleration of the total body CM: all body segments contribute to the total body
acceleration in proportion to their own mass and acceleration.
What is Newton's Law of Gravitation? - Answer - All bodies are attracted to one another with a force
proportional to the product of the masses and inversely proportional to the square of the distance
between them.
What is a Static System? - Answer - A static system is one that is at rest, or moving at constant velocity.
In other words, zero acceleration.
What is a dynamic system? - Answer - A dynamic system is one where the velocity is changing over time.
In other words, acceleration is not zero.
