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13 Cards in this Set
- Front
- Back
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friction
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A force that opposes the motion of one object moving past another.
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force
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A pull or push that acts on an object.
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Acceleration.
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A change in velocity.
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Speed
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How fast an object is changing its position with time at any moment.
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Inertia
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The tendency of an object to resist a change in its state of motion.
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Velocity
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The rate at which friction slows the speed of an object.
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Gravity
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An attraction between the mass of Earth and the mass of the object.
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Unbalanced force
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A force either partially cancelled out or not cancelled out at all by other forces.
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Accelerate
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The force of gravity between two objects increases when their masses do this.
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Balanced
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When the forces on an object cancel each other out.
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Weight
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The force of gravity on any object is called the object's ____.
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Air resistance.
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The force that prevents different objects from falling at the same rate.
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Lever
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A simple machine that has a rigid bar and fulcrum.
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