Flashcards in Biomechanics - Calculations, Centre Of Mass And Stability Deck (16)

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1

## Define force

### A push or pull that usually effects the state of motion of an object

2

## Define momentum

### The amount of motion possessed by a moving object

3

## Define acceleration

### The rate of change in velocity

4

## Define weight

### The gravitational force that the earth exerts on the mass of a body

5

##
How do you work out force?

What is the unit for force?

###
FORCE = mass x acceleration

Newtons (N)

6

##
How do you work out momentum?

What is the units for momentum?

###
Momentum = mass x velocity

Kilogram metres per second (Kgm/s)

7

##
What are the two formulas for acceleration?

What is the unit for acceleration?

###
1. Acceleration = force / mass

2. Acceleration = change in velocity / time

3. Meters per second (m/s)

8

##
What is the formula for weight?

What is weight measured in?

###
Weight = mass x gravitational field strength

Measured in kilograms (Kg)

9

## Define centre of mass

### The centre of mass is the point at which a body is balanced in all directions and from which weight appears to act

10

## What are the two factors that effect the centre of mass

###
Shape

Density of different parts of the body

11

## Where is the centre of mass of a regular shape and density

### The centre of mass will be in the centre of the object

12

## Where must the centre of mass be

### The centre of mass must be where the mass is balanced around it in all directions

13

## Define stability

### Stability is a measure of how easily an object is moved from a position of equilibrium or balance

14

## Define line of gravity

### Line of gravity is an imaginary line extending vertically downward to the ground from the centre of mass

15

## Define base of support

### The base of support is the area enclosed by the points of contact with the ground

16