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11 Cards in this Set
- Front
- Back
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______ was the first scientist to correctly observe that an object in motion will stay in motion unless something stops it.
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Galileo
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_____ ___ _____ came up with the three laws of motion.
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Sir Isaac Newton
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The First Law of Motion:
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An object tends to stay in motion unless it is stopped, and an object at rest will stay at rest unless moved.
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The resistance to a change in motion is called _____.
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inertia
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When a car stops suddenly, your body moves forward until the seatbelt stops you. The movement forward is an example of _______.
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inertia
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What forces keeps objects from moving forever in a straight line?
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gravity and friction
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_____ is the amount of matter in an object.
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mass
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_____ is the gravitational force on an object.
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weight
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How is friction helpful?
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It allows your feet to grip the floor and your body to grip the bed when you move.
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When is friction not helpful?
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When snow skiers wax their boards to reduce the friction, so they can go faster.
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What is the difference between mass and weight?
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Mass is the amount of matter of an object while weight is the amount of gravitational force on the object.
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