Inquiry Question: How are natural forces related to innovation? Describe whether forces are balanced or unbalanced Gold Give examples of forces in every day life Silver Define forces and give the units used to measure forces Bronze

Forces

What is a force? FORCES

A PUSH OR A PULL OR A TWIST IN A CERTAIN DIRECTION What is a force? A PUSH OR A PULL OR A TWIST IN A CERTAIN DIRECTION

When you ride a bike: PUSH the pedal down to make the bike move Pushing When you ride a bike: PUSH the pedal down to make the bike move

When you drop something, it is PULLED to the ground by gravity Pulling When you drop something, it is PULLED to the ground by gravity

HOW COULD FORCES AFFECT THIS RUBBER BALL?

How do forces affect objects? 1. Start moving

How do forces affect objects? 2. Move faster

How do forces affect objects? 3. Move slower

How do forces affect objects? 4. Stop moving

How do forces affect objects? 5. Change direction

How do forces affect objects? 6. Change shape

Inquiry Question: How are natural forces related to innovation? Describe whether forces are balanced or unbalanced Gold Give examples of forces in every day life Silver Define forces and give the units used to measure forces Bronze

What units do we use for forces? The Newton (N) 1. When and where did Newton live? 2. What are Newton’s 3 laws of motion? NEWTON

Force Meter or Newton Meter Measures how large a force is Three laws come onto later Theory of gravity Units for forces was named after him

Measuring forces Measurement Force (N) Lift pencil case Pull a tripod across the desk Lift your school bag Lift your water bottle option

Forces

Balanced forces

Showing forces We cannot see forces, but we can see the effects of the force. We show the direction of the force as arrows.

Representing Forces The direction of the arrow shows the direction of the force The length of the arrow shows the size of the force

If the table suddenly vanished, the book would fall to the floor. The force pulling the book down is greater than the force pushing it up. This is known as an unbalanced force. 2: One force is larger than the other so the book moves 3: Forces act in pairs

Complete Unbalanced forces sheet

GRAVITY REACTION FORCE The car is not moving. The same forces are acting on it that were acting on the book. GRAVITY REACTION FORCE

What would happen if the car started to move forwards really fast? GRAVITY AIR RESISTANCE THRUST REACTION FORCE

MISCONCEPTION ALERT! If a car is travelling at a CONSTANT SPEED – the forces are balanced so arrows should be the same size.

MISCONCEPTION ALERT! If a car is SPEEDING UP – the forces are unbalanced so the arrows are different sizes.

MISCONCEPTION ALERT! If a car is SLOWING DOWN – the forces are unbalanced so the arrows are different sizes.

CONSTANT SPEED AGAIN = forces are balanced MISCONCEPTION ALERT! CONSTANT SPEED AGAIN = forces are balanced

Add in arrows onto your diagrams

Forces Videos In your groups on your tables – create a video to show: 2 unbalanced forces 2 balanced forces On any object in the room you can find! You can cut out arrows to help you. Here are some key words to help you Balanced Unbalanced Speeding up Constant speed Slowing down You have today, and the double on Tuesday to do this. Class will view them on Wednesday and then go through tests Videos should be approx 3 mins Level ladders will be on your tables to help you include all the information you need to reach your targets

Dropping heavy objects simultaneously Parachutes Friction Pushing boxes forces acting Spring balance weighing Newtons Law Magnets Magnetic shield Magnetic materials Compasses working around the earth Cars and heights of ramps Imporatnce of repeats

Types of forces Gravitational Friction Tension Normal Air resistance Applied Spring Magnetic Force applied to an object by a person or object An object attracts another objects towards itself Attraction or repulsion that arises between electrically charged particles because of their motion Supporting force of a stable object that is in contact with something Exerted by a surface as an object moves across it Acts on objects moving through the air Force transmitted through a string, rope, cable or wire when pulled tight by forces acting from opposite ends Exerted by a compressed or stretched spring on any object attached to it

Contact or Non-contact? Indicate on your forces if you think they are contact or non-contact forces? Three laws come onto later Theory of gravity Units for forces was named after him