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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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Slide 3 - Diapositive
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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Slide 5 - Diapositive
Balanced and unbalanced forces
Balanced forces
Unbalanced forces
Resultant force
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Balanced or unbalanced?
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Balanced or unbalanced?
Slide 10 - Diapositive
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)
Slide 18 - Diapositive
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)
