English National Curriculum - Science
Mission Objectives
Explain the effects of balanced and unbalanced forces
Calculate the resultant force on an object
Draw a free body diagram showing the forces on an object (HT)
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Words and meanings to learn
resultant force
the overall force acting on an object when all the individual forces are combined
free body diagram
a simplified diagram that shows all the forces acting on an object
unbalanced force
when the forces acting on an object are not equal, causing the object to change its speed or direction; this occurs when the resultant force is not zero
vector
a quantity that has both magnitude (size) and direction
balanced force
when all forces acting on an object are equal in size but opposite in direction, resulting in no change in the object’s motion
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