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NUTR 384 > Exam 1: Chaper 1 > Flashcards

Exam 1: Chaper 1 Flashcards

1
Q

What is biomechanics?

A

The study of forces and their effects on living things.

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2
Q

What is mechanics and what type will we be talking most about?

A

Mechanics is the analysis of forces and their effects. We will be talking about rigid body mechanics.

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3
Q

What are the four types of subcategories for rigid body mechanics?

A

Statics
Dynamics
Kinematics
Kinetics

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4
Q

What is static rigid body mechanics?

A

Statics is constant motion.

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5
Q

What is dynamic rigid body mechanics?

A

Dynamics are accelerated bodies.

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6
Q

What is kinematics?

A

The description of motion

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7
Q

What is kinetics?

A

The forces that cause the motion.

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8
Q

What is mass?

A

The amount of matter within an object.

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9
Q

What is weight?

A

The force of gravity acting on the mass of an object.

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10
Q

What is inertia?

A

The amount of movement an object possesses

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11
Q

What are forces?

A

It can be defined as a push or a pull.

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12
Q

In what units can force be described in and what is a quantitative description of force?

A

It can be described in Newtons, which is the force needed to accelerate 1kg at a rate of 1m/s2.

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13
Q

What two ways can forces be classified?

A

Internal Forces and External Forces

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14
Q

What are internal forces?

A

Forces acting within a body or system

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15
Q

What are external forces?

A

Forces that act on a body as a result of interaction with the environment.

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16
Q

What are the two subcategories within internal forces?

A

Tensile forces and compression forces

17
Q

What are two very important external forces?

A

Normal force and friction force.

18
Q

Describe normal force.

A

It acts perpendicular to the surface and is caused by the mass being accelerated by gravity.

19
Q

Describe friction force.

A

It acts parallel to the surface and is proportional to the normal force.

20
Q

Describe the relationship between friction and surface area.

A

Friction is NOT affected by the size of the surface area. What does affect friction is the weight or the material that are in contact.

21
Q

What are colinear forces?

A

When forces act along the same line and in the same direction. They can be added using regular algebraic addition.

22
Q

What are concurrent forces?

A

When forces act in different directions, but through the same point.

23
Q

What is a vector resolution?

A

An operation that replaces a single vector with two perpendicular vectors such that the vector composition of the two perpendicular vectors yields the original vector. (creating the X and Y axises).

24
Q

What is a vector composition?

A

The process of determining a single vector from two or more vectors by vector addition.

25
Q

What is a resultant vector?

A

A single vector that results from vector composition.

NUTR 384 (7 decks)

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