Biomechanics Test - T4

Question 1

What is the relationship between torque and angular acceleration?

Answer 1

The greater the torque acting at the axis of rotation, the greater the angular acceleration of a given body.

Question 2

To determine the length of a moment arm, you would measure…

Answer 2

…the perpendicular distance from the axis of rotation to the force’s line of action.

Question 3

For any given muscle, the moment arm is largest when the angle of pull on the bone is closest to…

Answer 3

…90 degrees.

Question 4

Torque equation?

Answer 4

N x meters

Question 5

Third class lever? Example?

Answer 5

Fulcrum - Effort - Load e.g. baseball bat

Question 6

First class lever?

Answer 6

Effort - Fulcrum - Load

Question 7

As a joint is moved through its range of motion when strength training with free weights, such as doing the arm curl, the moment arm for the muscle crossing the joint will get…

Answer 7

…either a or b

Question 8

Torque magnitude equation?

Answer 8

cm x N / 100

Question 9

During angular motion, what is the relationship between the length of the moment arm and the torque created (when the force used is constant)?

Answer 9

The longer the moment arm, the greater the torque.

Question 10

Second class lever?

Answer 10

Effort - Load - Fulcrum

Question 11

An eccentric force does not pass through…

Answer 11

…an axis of rotation.