A
which of the following statements best describes biomechanics?
biomechanics is the application of mechanical principles in the study of living organisms
which of the following are examples of contact forces?
Both A and C
-Joint reactive forces
- Muscle forces
Plack skates improve skating performance by..
allowing great plantar flexion, with no increase in friction
What was the speed across a 5 km race, if moved in 15 min and 32 seconds?
B) 5.4 m/s
Which of the following statements is false regarding momentum?
B)The amount of momentum after the collision is always greater than the momentum after the collision
explanation: momentum must stay constant
which represents a qualitative analysis?
The answer choice without numbers
The force of gravity is an example of which of the following?
non-contact force
The vector on the image above describes which of the following motion?
Rectilinear
Using the figure to the right what was the velocity at time points A, B, and C?
Positive, negative
-up from 0, down from A, B, to C
Which of the following statements is false regarding the law of acceleration?
c) Acceleration is proportional to mass
-it is inversely proportional to mass, and proportional to force
which of the following is not an example of a kinematic variable?
force
T/F: A net force represents multiple factors derived from the vector composition of all acting forces to determine the overall effect on a body.
TRUE
What is the overall horizontal(x) displacement of the knee joint?
D) 12 units to the right
18-6=12
Which of the following statements is true regarding projectile motion?
Vertical acceleration is constant at -9.81m/s/s
What is the influence of reducing the time interval over the impacts occur?
greater force experience
which of the following would best describe a force?
a) push or pull b) effect one body has on another
b) affect one body has on another
c) required to change the acceleration of an object
d) all of these, best describe a force
d) all of these, best describe a force
Using the image on the right of the biceps, what kind of forces are the vectors?
Colinear forces(act in the same direction)
What is the resultant displacement from position 1 to position 2?
5.1 units (horizontal)
explanation: 6.5->11.6=5.1
T/F: A taller individual will have a slight advantage in a shot put compared to a shorter individual.
true
Which of the following statements is false regarding the law of reaction?
reaction forces cancel out action forces.
explanation: they do not cancel each other out, only cause different actions
Ground reaction force is an example of which of the following?
external force
Which of the following adjustments would increase the force of friction?
D) A and C
-increasing the coefficient of friction
-increasing the normal forces
What is the vertical(y) displacement from position 1 to position 2?
0 units
explanation: 5->5=0
Which of the following statements is false regarding the law of inertia?
all of these statements are true
which of the following statements best describes biomechanics?
Biomechanics is the application of mechanical principles in the study of living organisms.