Forces and acceleration

A Force is basically a push or a pull. Forces have three basic effects. They can cause objects to change speed, change direction or change shape.

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which force is responsible for the orbit of objects in space is:

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which force is in the opposite direction to movement

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which force increases the length of stretched spring

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which force attracts protons and electrons

A Scalar quantity is a quantity that has magnitude only and does not have a direction.
A vector quantity is a quantity that has magnitude and direction.

Forces are vector quantities.
This means that they have a magnitude (size or amount) and a direction.

When drawing force diagrams arrows are used to represent the direction and magnitude of a force.

Often there maybe more than one force acting on an object. The resultant force is a single force that represents the combined effect of two or more forces.
At GCSE we generally deal with forces that are either parallel or perpendicular.

If parallel forces are pointing in the same direction add them together to calculate the size of the resultant.
If parallel forces are pointing in opposite directions subtract them to calculate the size of the resultant force.

SUMMARY VIDEO. You only need to watch upto 3 minutes 15 seconds.

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Calculate the resultant force and its direction for example 2 and 3

See this website for a useful summary and to see how the resultant force for forces at an angle are determined which you will cover in year 10:-

https://www.savemyexams.co.uk/gcse-physics-aqa-new/revision-notes/forces/forces-interactions/resultant-forces/

We will now move onto the effects of forces on the movement of an object.

If the forces on an object are balanced then:- 
A moving object will continue to move at the same speed and in the same direction.
And
A stationary object will remain stationary.

If the forces on an object are unbalanced the object will accelerate. 
(Acceleration can cause an object to speed up, slow down or change direction)

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What effect does a resultant force have on the motion (movement) of an object

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What effect does friction have on the motion of a moving object?

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Why does an ice skater continue to slide much more easily on ice compared to a child sliding wearing socks on a wooden floor

The game 'asteroids' gives a good example of Newton's first law.

https://www.embed.com/arcade/asteroids.html

The spaceship does not move until there is a resultant force from the rocket.
When there is no force the spaceship continues to move at constant speed and direction.
In order to speed up, slow down or change direction of the spaceship there needs to be a resultant force from the rocket.

(The game also demonstrates another physics concept which is the conservation of momentum. When a large asteroid with heavy mass is blasted into smaller fragments which have less mass, the smaller fragments move at higher speed to conserve the momentum).

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In space there is no friction. What effect does this have on moving obects in space which have zero resultant force

In the video below the presenter mentions 'net force' this is the same as 'resultant force'.

You onlny need to be aware of approximately the first 5 minutes of the video.

MAIN LESSON FOCUS NEWTON'S SECOND LAW AND THE EQUATION F = m a

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What type of quantity is a force

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The Saturn 5 rocket was used in the Apollo space missions to launch the spacecraft and crew into space, that landed on the moon.

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What is the answer to the above question

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The Saturn 5 rocket was used in the Apollo space missions to launch the spacecraft and crew into space, that landed on the moon.

1

Please take a photo or screenshot and upload in the space below, or use the whiteboard below to answer the questions above.

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Forces and acceleration

which force is responsible for the orbit of objects in space is:

which force is in the opposite direction to movement

which force increases the length of stretched spring

which force attracts protons and electrons

Calculate the resultant force and its direction for example 2 and 3

What effect does a resultant force have on the motion (movement) of an object

What effect does friction have on the motion of a moving object?

Why does an ice skater continue to slide much more easily on ice compared to a child sliding wearing socks on a wooden floor

In space there is no friction. What effect does this have on moving obects in space which have zero resultant force

What type of quantity is a force

The Saturn 5 rocket was used in the Apollo space missions to launch the spacecraft and crew into space, that landed on the moon.

What is the answer to the above question

The Saturn 5 rocket was used in the Apollo space missions to launch the spacecraft and crew into space, that landed on the moon.

Please take a photo or screenshot and upload in the space below, or use the whiteboard below to answer the questions above.

Which statements correctly describe possible effects of forces (choose 5):-

which force is responsible for the orbit of objects in space is:

which force is in the opposite direction to movement

which force increases the length of stretched spring

which force attracts protons and electrons

Calculate the resultant force and its direction for example 2 and 3

What effect does a resultant force have on the motion (movement) of an object

What effect does friction have on the motion of a moving object?

Why does an ice skater continue to slide much more easily on ice compared to a child sliding wearing socks on a wooden floor

In space there is no friction. What effect does this have on moving obects in space which have zero resultant force

What type of quantity is a force

The Saturn 5 rocket was used in the Apollo space missions to launch the spacecraft and crew into space, that landed on the moon.

What is the answer to the above question

The Saturn 5 rocket was used in the Apollo space missions to launch the spacecraft and crew into space, that landed on the moon.

Please take a photo or screenshot and upload in the space below, or use the whiteboard below to answer the questions above.