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Arm wrestle
The forces start out balanced and then one person starts to win because they are pushing with a bigger force.
Unbalanced forces
The forces are balanced
An unbalanced force will make something change speed or direction.
500N 500N
Worksheet
The forces on the car are
balanced
Complete the unbalanced forces worksheet.
The forces on him are balanced
Learning objectives
Know that balanced forces mean something will stay still or keep moving at the same speed.
Know that unbalanced forces will make something change speed or direction.
Forces
What is the force that always pulls down on you?
What is the force that tries to slow a car down?
What is the force that keeps a plane in the air?
If gravity pulls us down what stops us getting pulled to the centre of the earth?
Upthrust pushes the plane up
The ground pushes back
Friction slows
the car down
Friction pulls
the plane back
The engine pushes the plane forward
The ground pushes back on the car
Gravity pulls
him down
Gravity pulls the plane down
The engine pushes the car forward
Gravity pulls the car down