Physics Chapter 3 – Flashcards
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Which of the following is a physical quantity that has both magnitude and direction
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vector
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Which of the following is an example of vector quantity
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velocity
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Identify the following quantities as scalar or vector: the speed of a snail, the time it takes to run a mile, the free-fall acceleration
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scalar, scalar, vector
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Multiplying or dividing vectors by scalars results in
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vectors
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Which of the following is an example of projectile motion
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a thrown baseball
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In a coordinate system, a vector is oriented at angle 0 with respect to the x-axis. The x component of the vector equals the vector's magnitude multiplied by which trigonometric function
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cos 0
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A football player runs in one direction to catch a pass, then turns and runs twice as fast in the opposite direction toward the goal line. Which of the following is a correct expression for the original velocity and the resulting velocity and the resulting velocity
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V players -2V player
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What is the path of a projectile (in the absence of friction)
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a parabola
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Which of the following exhibits parabolic motion
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stone thrown in a a lake
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A piece of chalk is dropped by a teacher walking at a speed of 1.5 m/s. From the teacher's perspective, the chalk appears to fall
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straight down
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In a coordinate system, the magnitude of the x component of a vector and 0, the angle between the vector and x-axis are known. The magnitude of the vector equals the x component
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divided by the cosine of 0
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Multiplying or dividing vectors by scalars results in
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vectors
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Which of the following is an example of vector quantity
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displacement
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Which of the following is not an example of projectile motion
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a hot-air balloon drifting toward Earth
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A passenger on a bus moving east sees a man standing on a curb. From te passenger's perspective, the man appears to
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move west at a speed that is equal to the bus's speed
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For the winter, a duck flies 10.0 m/s due south against a gust of wind with a speed of 2.5 m/s. What is the resultant velocity of the duck
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7.5 m/s south
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Which of the following is the motion of objects moving in two dimensions under the influence of gravity
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projectile motion
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Identify the following quantities as scalar or vector: mass of an object, the number of leaves on a tree, wind velocity
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scalar, scalar, vector
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Which of the following is a physical quantity that has a magnitude but no direction
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scalar
