Les 5 — Balanced and unbalanced forces

• Natuurkunde / Scheikunde
• Middelbare school
• havo
• Leerjaar 1

This lesson

• Balanced and unbalanced forces
• The homework
• Resultant force

https://www.youtube.com/watch?v=n2gQs1mcZHA&ab_channel=Don%27tMemorise

Learning goals

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

Balanced and unbalanced

forces

• Balanced forces
• Unbalanced forces
• Resultant force

Balanced and unbalanced

forces

Balanced or unbalanced?

Balanced or unbalanced?

The forces on an object are 

balanced.

How does this effect its motion when...

• It is stationary?

• it is moving at a constant speed?

Balanced Forces

When an object is...

• standing still –> keeps standing still

• Moving –> travels at a constant speed.

The forces on an object are unbalanced.

How does this effect its motion when...

• it is stationary?

• it is moving at a constant speed?

Unbalanced forces

When an object is...

• standing still –> starts moving

• Moving –> accelerates or decelerates

The homework

1. Unbalanced

2. Balanced

3. 

a) Balanced

a) Unbalanced

a) Unbalanced

What word fits each situation best?

Moving at a constant velocity

Accelerating

Decelerating

Learning goals

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

Balanced or unbalanced?

Resultant fore?

Balanced or unbalanced?

Resultant fore?