Flashcards in Forces And Motion Deck (22):

0

## Use the following units

###
Kilogram Kg

Metre m

Metre per second m/s

Metre per second squared m/s2⃣

Newton N

Newton per kilogram N/Kg

Second s

Kilogram metre per second Kgm/s

1

## What are the skills needed for plotting distance time graphs?

###
plotting points accurately

Labelling axes with quantities and units

Selecting an appropriate scale filling over half the page avoiding weight scales

2

## How do you join the dots on a distant time graph?

### You connect the points dot to dot

3

## What does the shape of a distance time graph look like at rest?

### A straight, horizontal line

4

## What does a distance time graph look like at a constant speed?

###
A straight line at a gradient

if the gradient is steeper then… Speed is faster

5

## How do you work out the gradient on a graph?

###
Gradient = rise/run

Which = distance moved/time taken

6

## What does a distance time graph look like at an increasing speed?

###
A curved line represents a change in speed

If the gradient of the line is increasing shallow to steep then speed is increasing

Is the gradient of the line is decreasing then the speed is decreasing

7

## What equation links speed distance and time?

### Speed = distance/time

8

## Describe an experiment of how to investigate the nation of everyday objects such as toy cars what tennis balls?

###
1)Measure distance between points using ruler

Mark these points with a marker

Start the stopwatch when object passes 1st mark

Stop stopwatch when object passes second

Repeat 3 times to ensure its consistent data

Use speed = distance/ time to find out

9

## Describe another experiment of how to investigate the nation of everyday objects such as toy cars what tennis balls?

###
Set up two light gates so that object passes through both

When the beam of light is broken it sends signal to computer

Measure distance between light gates with a ruler

(Same as last)

10

## What is the equation that links exenteration, change in velocity, time?

### Acceleration = change in velocity/time

11

## How do you find the distance on the speed time graph?

###
Distance under the graph

If it's at a gradient then you do half distance times height

12

## On a velocity time graph what's is the gradient equal to?

### The acceleration

13

## On a distance time graph what's the gradient equal to?

###
Speed

14

## Equation which links force mass and acceleration

### F = ma

15

## What equation links wright mass and g?

### w =mg

16

## Why does a falling object reach terminal velocity?

###
If I drop an object of the building it starts to accelerate

This is because there is a resultant force(greater than any drag acting)

As the object accelerates it's drag increase

Eventually drag = weight acting down

At this point there's no resultant force

Therefore the object doesn't accelerate and falls with a constant velocity known as terminal velocity

17

## What factors effect thinking distance

###
Speed

Alcohol

drugs

Distractions

Tiredness

18

## What factors affect braking distance

###
Road conditions

Weather

Break conditions

19

## Equation linking moment force and perpendicular distance from pivot

### Moment = force ❌ perpendicular distances from pivot

20

## What is the principal of moments?

### A system is in equilibrium when the sum of the anticlockwise moment equals the sum of the clockwise moment

21