KNS 200 CONTENT EXAM 2 STUDY GUIDE
1. Biomechanics definition: Applications of mechanical principles to understand ettects of forces on
physical functions and structures.
2. Mechanics definition: A branch of physics that studies motion (kinematics) and the causes of motion
(kinetics).
3. Why use Biomechanics?: 1. Improve the outcomes of our movements (performance ettectiveness)
2. Increase or maintain the safety and health of our tissues.
4. Displacement definiton: Ditterence between the initial and final positions.
Unit: Meters
d = dfinal - dinitial
5. Displacement Example 1: A person starts at the beginning of straight way of
a track and finish at the end of the straight way. What is his displacement?
Displacement Example 2: What is his displacement when he runs the entire
loop and returns to the starting point?: Example 1: 100 meters
Example 2: 0 meters
6. Velocity definition: Rate of change in position (vector)
Unit: meter/second
v = (dfinal - dinitial)/Δt
7. Velocity Example 1: When a sprinter in a 100-meter dash reaches the first
10-meter line in 2.5 seconds, what is the velocity that he reaches?: Example 1: Velocity
= 4 m/s
8. Acceleration definition: Rate of change in
velocity Unit: meter/second^2
a = (vfinal - vinitial)/Δt
9. Mass (m)
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, definition: Inertia
Quantity of matter in the
body
Unit: kg
10. Force (F) definiton: A push or a pull (friction, gravity, and air
resistance) F = ma
- m : mass, a : acceleration
Unit: Newton (1 N = 1kg x meters/second^2)
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1. Biomechanics definition: Applications of mechanical principles to understand ettects of forces on
physical functions and structures.
2. Mechanics definition: A branch of physics that studies motion (kinematics) and the causes of motion
(kinetics).
3. Why use Biomechanics?: 1. Improve the outcomes of our movements (performance ettectiveness)
2. Increase or maintain the safety and health of our tissues.
4. Displacement definiton: Ditterence between the initial and final positions.
Unit: Meters
d = dfinal - dinitial
5. Displacement Example 1: A person starts at the beginning of straight way of
a track and finish at the end of the straight way. What is his displacement?
Displacement Example 2: What is his displacement when he runs the entire
loop and returns to the starting point?: Example 1: 100 meters
Example 2: 0 meters
6. Velocity definition: Rate of change in position (vector)
Unit: meter/second
v = (dfinal - dinitial)/Δt
7. Velocity Example 1: When a sprinter in a 100-meter dash reaches the first
10-meter line in 2.5 seconds, what is the velocity that he reaches?: Example 1: Velocity
= 4 m/s
8. Acceleration definition: Rate of change in
velocity Unit: meter/second^2
a = (vfinal - vinitial)/Δt
9. Mass (m)
1/
11
, definition: Inertia
Quantity of matter in the
body
Unit: kg
10. Force (F) definiton: A push or a pull (friction, gravity, and air
resistance) F = ma
- m : mass, a : acceleration
Unit: Newton (1 N = 1kg x meters/second^2)
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