If the above are still a little too hard try the sheet below. Here I am not asking you to calculate speed distance or time, but can you extract the information from the sheet, write the equation and substitute?

S2 Forces Unit Material, containing the Assessed Practical and details for plotting graphs in Excel.

Wow! This is an important Physics topic, your first topic in the S2 physics course. All the info you cover in class is given below. We will start at the beginning but can rush through the bits that you’ve covered in primary.

Forces powerpoint and powerpoint pdf file for 2021 onwards

In the back of your jotter write a piece “What I learned about myself in S1 Science” This is not the topics that you covered- I know those, but what did you learn about yourself, your ability to think for yourself, try tasks etc. What skills have you learned .

3

2

Forces Walk

4

Hookes Law table & Hookes Law graph (this is an assessment piece)

5

Literacy Task

6

Answering the mass and weight questions

1st June 2019

All

Revise the work you’ve completed this week and previous weeks

If you haven’t got results for the Hooke’s Law Assessment use the ones below. Copy the results into Excel, find the average extension using the formula =average(range) . Then plot a graph of Weight against average extension.

Weight

Extension (cm)

Extension (cm)

(N)

‘/1

‘/2

0

0

0

1

2.4

2.3

2

4.8

4.8

3

7.2

7.3

4

9.6

9.6

5

12

12.1

6

14.4

14.2

7

16.8

16.5

8

19.2

19.1

9

21.6

21.5

10

24

23.9

There is a separate post on EXCEL with details of how to create a table of results and plot a graph in Excel, which is useful for all students studying Physics, and other Sciences too- a useful life skill.

Here is the start of the TRANSPORT materials for lower school. You could choose to use this as an applications based upper school science course.

I have uploaded the powerpoint presentations and the corresponding pdf versions. Please note most of these files are very big! The file we are working on is highlighted in red.

Tart Ma Cart If you wish to have a copy of this document in powerpoint please contact Mrs Physics.

Below are a set of resources for use with various parts of the Road Safety Topic. All these documents are currently in word format. Eventually I will upload pdf copies too. They are not necessarily in order- sorry.

We mentioned using the calculator to convert hours and minutes to decimals. You can find the link here. Using your calculator

holiday competition instructions Pupils find their average speed for a journey they made during the holidays. Issue prior to the holidays

Finding the Area Here is an exercise for students who might find it difficult to find the area under a v-t graph

Casualties grouptask This task might be a good starter for National 5 Assignments

Physics of Road signs Linking Physics with Road Signs, to introduce how Road Safety is all about Physics. This makes a good starter homework. The answers aren’t fixed and can be a great discussion opportunity.

MEASURING REACTION TIME Some ideas on how to find the reaction time of students, including some great websites. If you have a FIFEX reaction timer they make great practicals too.

This excel spreadsheet will allow you to find your reaction times from a dropping ruler. Just enter the drop distances in the yellow boxes and excel does the rest. Don’t forget to write down the values it gives you.

Is the change in speed in one second. . An unbalanced force causes acceleration or deceleration.

Usually this is measured in m/s^{2} but can be measured in mph/s

Air Resistance

It is the force that slows things down when they are moving through air.

At rest

we use this term to mean not moving. We can also say the object is stationary.

Average speed

found by timing how long it takes a vehicle to travel a known distance. Distance travelled per second.

measured in m/s

Balanced forces

When two equal forces are acting on an object in opposite directions and cancel each other out

Chemical energy

A store of energy in the form of a chemical, eg fuel for cars and food

construction

how something is made

Deceleration

The decrease in speed in one second. Something slowing down. This should be represented by NEGATIVE ACCELERATION

metres per second squared (m/s^{2}) or ONLY in Transport mph/s

Displacement

how far you have travelled in a straight line. We would say “as the crow flies”

It is measured in metres or miles but must also have a direction. eg 10m north, 20 miles to the left.

Distance

how far you have travelled. It is another name for length.

It is measured in metres or during our road safety topic miles.

Dynamics

The mechanics part dealing with Forces

Effects of a Force

A force can change an objects speed, shape and direction.

Energy

Can be changed from one form into another form but cannot be created or destroyed

Force

A push or a pull. Has the symbol F and is measured in Newtons (N).

Newton

Force of gravity

Another name for weight

Newton

Friction

Is a force that can oppose the motion of a body.

Newton

Gravitational field strength

It is the force of gravity or weight acting on every kilogram. The weight per unit mass

Newton’s per kilogram

Gravitational potential energy

The work done against gravity

Joule

Gravity

A phenomena that causes objects to fall down, BE CAREFUL HOW YOU USE THIS TERM and where possible try to avoid it.

Heat energy

The energy produced when objects are slowed down by friction.

Joule

Heat energy

The internal energy of an object. Heat may be defined as energy in transit from a high temperature object to a lower temperature object.

Joule

Hookes Law

This law states that providing you don’t overstretch a spring the stretch or extension of a spring will double if the force on the spring is doubled.

Instantaneous speed

is the speed at which you are travelling over a very short distance.

It is measured in metres per second or miles per hour.

Instantaneous speed

The speed at one particular point in time (and can be very different from the average speed). It is the same as average speed if journey time is very small or if the object is traveling at a constant speed.

m/s

Kinematics

Mechanics dealing with motion, speed, acceleration etc

Kinetic energy

Symbol Ek Is the energy an object has because it is moving. The higher the speed the greater will be it’s kinetic energy

Joule

maintenance

the care or upkeep of a mechanical object

Mass

The amount of matter in an object and is measured in kilograms.

kilogram

Mechanics

The branch of Physics dealing with motion (how things move).

Momentum

The product of mass and velocity. A quantity that only moving objects possess.

Newton balance

Is used to measure force (a spring balance)

Newtons First Law

States that an object remains at rest or continues in the same direction at the same speed, unless there is an unbalanced force acting

Newtons Second Law

States that F = m x a

Potential energy

A store of energy

Joule

Reaction Force

A force pushing in the opposite direction to the action force eg, a gun fires a bullet, the gun places as action force on the bullet but the bullet places a REACTION force on the gun.

Newton

Reaction Time

The time it takes our brain to process information that something has changed, or a danger has occurred.

second

Resultant force

A force can change an objects speed, shape and direction.

Newton

Scalar

A quantity that is fully described by a value and unit

Speed

how far you travel every second.

In the lab our distances are measured in metres and our time is measured in seconds so our units of speed would be metres per second.

Speed

is the distance travelled in unit time.

In road safety we look at miles travelled every hour or miles per hour.

Stationary

we use this term to mean not moving. We can also say the object is at rest.

Time

how long your journey took.

It is measured in seconds or during our road safety topic hours.

Uniform Speed

When your speed is uniform we mean that your speed isn’t changing. It remains constant.

Upthrust

It is the force that pushes things up in water.

Vector

A quantity that is fully described by a value, a direction and unit.

Vehicle

A thing used for transporting people or goods, esp. on land, such as a car, truck, or cart.

Weight

It is the force of gravity pulling an object down and is measured in Newtons

Work done

Is a measure of the energy transferred when a force moves through a distance. Work done = force x distance in the direction of force