Vocabulary Force and Motion

The speed and direction of an object's motion.

• Inertia
• Equilibrium
• Velocity
• Acceleration

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Any substance that reduces friction and helps moving parts move more freely.

• Oil
• Powder
• Silicone
• Lubricant

A push or pull that acts on an object.

• Force
• Gravity
• Friction
• Lubricant

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The change in position of an object.

• Acceleration
• Motion
• Equilibrium
• Unbalanced Force

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The combination of different forces acting on an object at the same time.

• Net force
• Balanced force
• Equilibrium
• Unbalanced force

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The state an object is in when all forces acting on it balance each other.

• Inertia
• Net force
• Equilibrium
• Velocity

Forces that are not equal in size and direction.

• Equilibrium
• Unbalanced forces
• Acceleration
• Velocity

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The rate at which the velocity of an object changes over time.

• Acceleration
• Speed
• Direction
• Motion

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A force that resists the movement of one surface past another surface.

• Acceleration
• Gravity
• Friction
• Lubricant

The tendency of an object to resist any change in motion.

• Net force
• Motion
• Momentum
• Inertia