Deck 8: Basic Biomechanics

Question 1

A muscle that generates most of its force directed back into the joint is producing which type of force?

A) Angular force
B) Stabilizing force
C) Dislocating force
D) Force couple

Answer 1

B

Question 2

The reason that a large-handled object is easier to turn is that the mechanical advantage is larger.
Multiple Choice
Identify the choice that best completes the statement or answers the question.

Answer 2

True

Question 3

If a PTA wishes to manually resist the knee extensors for an athlete and wishes to make the exercise as difficult as possible for the client,the best placement of her hand would be which of the following?

A) Proximal to the knee joint
B) Just distal to the tibial tuberosity
C) Midpoint of the tibia
D) Just proximal to the talus

Answer 3

D

Question 4

In order to increase the challenge of a person working on balance,you could do which of the following?

A) Raise the center of gravity and increase the base of support
B) Raise the center of gravity and decrease the base of support
C) Lower the center of gravity and increase the base of support
D) Lower the center of gravity and decrease the base of support

Question 5

Two forces acting in equal but opposite directions and resulting in a turning effect is called a

A) stabilizing force.
B) dislocating force.
C) moment of force.
D) force couple.

Question 6

In order to decrease the challenge of a client working on balance,you would do which of the following?

A) Raise the center of gravity and increase the base of support
B) Raise the center of gravity and decrease the base of support
C) Lower the center of gravity and increase the base of support
D) Lower the center of gravity and decrease the base of support

Question 7

The law of motion best demonstrated when a person in a wheelchair gains speed when she pushes on the rims is the

A) law of inertia.
B) law of acceleration.
C) law of action-reaction.
D) law of physics.

Question 8

Most concentric exercises done in the body are considered to be which type of lever?

A) First class
B) Second class
C) Third class
D) Fourth class

Question 9

The type of machine that consists of a grooved wheel that turns on an axle with a rope or cable is a(n)

A) movable pulley.
B) wheel and axle.
C) fixed pulley.
D) inclined plane.

Question 10

You are working with a client to regain function after shoulder surgery.Now you want to focus on exercises to increase power.You would choose which of the following exercises?

A) Concentric strengthening
B) Eccentric strengthening
C) Stretches
D) It doesn't matter; any of the above will help increase power.

Question 11

The state of equilibrium demonstrated when an object's COG is unchanged when it is disturbed is

A) stable equilibrium.
B) unstable equilibrium.
C) neutral equilibrium.
D) None of the above