Exam Two

Question 1

The term used to describe the causes of movement (e.g. forces, powers and energies of movement.)

Answer 1

Kinetics

Question 2

mass x acceleration

- can be thought of as a push or pull acting on a body.

Answer 2

Force

Question 3

Resistance to change

-the tendency of a body to maintain its current state of motion, whether motionless or moving with a constant velocity.

Answer 3

Inertia

Question 4

Mass x gravity

Answer 4

Weight

Question 5

force x distance perpendicular (how hard is it to get something rotating)

Answer 5

Moment of Force

Question 6

Force x time

Answer 6

Impulse

Question 7

Quantity of matter composing a body

Answer 7

Mass

Question 8

The point around which a body’s mass is equally balanced in all directions.
-gives an index of total body motion

Answer 8

Center of Mass (COM)

Question 9

The ground pushes up and forward (equal and opposite reaction force), therefore the runner moves forward and upwards.

Answer 9

Ground Reaction Force

Question 10

Force distributed over a given area

Answer 10

Pressure

Question 11

Mass x velocity

Answer 11

Momentum

Question 12

In order to alter momentum you have to change/

Answer 12

Mass and Velocity

Question 13

Force x Time

Answer 13

Impulse

Question 14

Is the energy that we calculate in Biomechanics physiological or mechanical? and is it equal/

Answer 14

Mechanical - def not equal to physiological energy

Question 15

What is an example of strain energy in the body?

Answer 15

A rubberband

Question 16

What is moment of inertia?

Answer 16

resistance to change in angle of motion.

Question 17

How can moment of inertia be altered?

Answer 17

Changing the mass of distribution

Question 18

How is moment of inertia related to angular momentum?

Answer 18

Moment of inertia is a component of angular momentum

Question 19

Can angular momentum change in mid-air?

Answer 19

NO

Question 20

What can change in mid-air?

Answer 20

Moment of inertia (body placement)

Question 21

If a tight rope walker is falling to their right, which way should they tilt their balance pole?

Answer 21

In the same direction in which they are falling (to the right)

Question 22

The sum of the forces and moments equal what hen in equilibrium? Name a muscular contraction that fits this description?

Answer 22

Zero - Isometric contraction

Question 23

What is the relation between COM and the Center of Pressure?

Answer 23

COM is like the sheep and the center of pressure is like the sheep dog. (trying to maintain balance/stability)

Question 24

The description of motion

Answer 24

Kinematics

Question 25

What is the difference between distance and displacement?

Answer 25

Distance is the measurement along the path of motion (SCALAR) while displacement is the measurement of the change in the angle from first to last position (VECTOR).