1.2 Balanced forces

1.2 Balanced and unbalanced

forces

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Natuurkunde / ScheikundeMiddelbare schoolhavoLeerjaar 1

This lesson contains 27 slides, with text slides.

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1.2 Balanced and unbalanced

forces

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Learning goals

Recognise balanced and unbalanced forces.
Name two things balanced forces can do.
Name two things unbalanced forces can do.
Calculate resultant force.

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How do you show forces

You show forces with an arrow.

The length of a force shows the magnetitude.

And the direction of the arrow shows the direction of the force.

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Balanced and unbalanced forces

Balanced forces
Unbalanced forces
Resultant force

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Balanced or unbalanced?

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Balanced or unbalanced?

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Resultant force

A resultant force, also called a net force, is a force equal to the sum of all forces applied to an object. For example, a 3N force to the left and 10N force to the right gives a resultant force of 7N to the right.

Fingerspell

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Forces in the same direction add up.

Forces in opposite direction cancel out.

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The effects of:

Balanced and unbalanced forces

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Stationary: When an object is not moving, standing still

Constant velocity: When an object is moving at a constant speed

Acceleration: When the speed of an object is increasing (or decreasing)

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Stationary: When an object is not moving, standing still

Constant velocity: When an object is moving at a constant speed

Acceleration: When the speed of an object is increasing (or decreasing)

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Stationary: When an object is not moving, standing still

Constant velocity: When an object is moving at a constant speed

Acceleration: When the speed of an object is increasing (or decreasing)

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Stationary: When an object is not moving, standing still

Constant velocity: When an object is moving at a constant speed

Acceleration: When the speed of an object is increasing (or decreasing)

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The forces on an object are

balanced.

How does this effect its motion when...

It is stationary?

it is moving at a constant speed?

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Balanced Forces

When an object is...

stationary –> It stays stationary

Moving –> travels at a constant speed.

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The forces on an object are unbalanced.

How does this effect its motion when...

it is stationary?

it is moving at a constant speed?

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Unbalanced forces

When an object is...

stationary –> It starts moving

Moving –> accelerates or decelerates

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balanced forces

Unbalanced forces

stationary objects

Moving objects

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balanced forces

Unbalanced forces

stationary objects

stays stationary

starts moving

Moving objects

keeps the same speed

accelerates/ decelerates

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Working on exercises

Homework:

Do: textbook 1.2 - the yellow block exercises

Do: workbook exercises 1.2 inclusive E

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1.2 Balanced forces

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