KNS 422: Fundamental Concepts - Fa23

Which phrase best defines biomechanics?

• The scientific study of the acute responses and chronic adaptations to exercise.

• The science of the structure of the body.

• The scientific study of human movement.

• The application of the laws of mechanics to the study of biological systems.

Which of the following is Newton’s 2nd Law of Motion?

• The acceleration of a body is directly proportional to, and in the same direction as, the net external force acting on the body, and inversely proportional to its mass.

• Every object attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

• A body will remain in its state of motion unless acted on by a net external force

• When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction to that of the first body.

A runner coming to a stop increases her velocity from 0 m/s to 7 m/s in 0.8 seconds.  What was her acceleration?

Round your answer to 2 decimal places. You do not need to include units.

A man has a mass of 60 kg. What is the magnitude of his body weight in Newton's?

Round your answer to 2 decimal places. You do not need to include units.