Lecture 13 - Linear Kinetics

Question 1

What generates the forces that move the body?

Answer 1

Muscles

Question 2

How to muscles generate movement?

Answer 2

By causing bones to move with respect to each other at a joint

Question 3

Do muscles push or pull bones?

Answer 3

Pull

Question 4

What is Newton’s second law?

Answer 4

F = ma

Question 5

What does Newton’s second law mean?

Answer 5

It states that there must be an external force to change the momentum of a system

Question 6

What does Newton’s second law tell you?

Answer 6

The effect of the external force

Question 7

What variables are represented by Newton’s second law?

Answer 7

Force (vector), mass (scalar), and acceleration

Question 8

Which direction will the force always be in?

Answer 8

The same direction of the acceleration caused by that force

Question 9

What causes acceleration?

Answer 9

Force

Question 10

How can you increase acceleration?

Answer 10

By increasing force or decreasing mass

Question 11

What did the study “Obesity and Musculoskeletal Injury” by Wearing SC et al (2006) find?

Answer 11

Increases in mass due to obesity is likely to alter the mechanics of daily living, leading to an increased risk of musculoskeletal injury