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22 Cards in this Set
- Front
- Back
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In order to determine speed, you must know
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time and distance
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The difference between speed and velocity is that velocity includes
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direction
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What is not a factor in calculating momentum- mass, acceleration, direction or speed
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acceleration
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If you divide momentum by velocity, the result is the value of the object's
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mass
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Whenever an object is standing still, the value(s) that is/are always zero is/are
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speed, momentum and velocity
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Acceleration is defined as the change in velocity divided by
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time
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The SI unit for acceleration is
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m/s
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On a velocity-time graph, a line with a negative slope indicates that the object is
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slowing down
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When the velocity of an object changes, it is acted on by a(n)
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force
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A tug or war that results in one team pulling the other team across the line is an example of
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unbalanced forces
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Mr. Luring
Integrated Science Chapter 8 revised |
cut apart and study
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Friction is defined by
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force that opposes momentum between two surfaces that are touching
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Which of the following situations demonstrates the effects of friction? 1. a parachutist descending to the ground 2. an apple falling from a tree 3. a loaded slingshot 4. two trucks colliding
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a parachutist descending to the ground
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When objects are moved further apart from each other, the force of gravity
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decreases
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The law that states that every object maintains constant velocity unless acted on by an unbalanced force is
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Newton's first law of motion
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The law that states that for every actin force there is an equal and opposite reaction force is
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Newton's third law of motion
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The law that states that the unbalanced force acting on an object equals the object's mass times its acceleration is
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Newton's second law of motion
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The SI unit of force, named for the scientis who described the relationship between motion and force, is called the
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newton
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When air resistance balances the weight of an object that is falling, the velocity
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remains constant
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Distinguish between balanced forces and unbalanced forces
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Balanced forces are when forces are equal. Unbalanced forces cause motion
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What is the difference between mass and weight?
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Mass= the number of atoms
weight= the gravity's force on a body |
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List two situations in which friction is helpful or necessary
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running
driving |
