# College Physics Study Set 7

Physics & Astronomy

## Quiz 2 :Motion in One Dimension

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A European sports car dealer claims that his car will accelerate at a constant rate from rest to 100 km/hr in 8.00 s.If so, what is the acceleration? (Hint: First convert speed to m/s.)
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A

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A ball is thrown vertically upwards at 19.6 m/s.For its complete trip (up and back down to the starting position), its average velocity is:
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D

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In one-dimensional motion, the average speed of an object that moves from one place to another and then back to its original place has which of the following properties?
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A

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Changing the positive direction in a reference frame to the opposite direction does not change the sign of which of the following quantities?
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On a position versus time graph, the slope of the straight line joining two points on the plotted curve that are separated in time by the interval Dt, is which of the following quantities?
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An object moves 20 m east in 30 s and then returns to its starting point taking an additional 50 s.If west is chosen as the positive direction, what is the average speed of the object?
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A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 8.00 s.What is the speed after the first 5.00 s of acceleration? (Hint: First convert the speed to m/s.)
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The distance of the Earth from the sun is 93 000 000 miles.If there are 3.15 * 107 s in one year, find the speed of the Earth in its orbit about the sun.
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A railroad train travels forward along a straight track at 80.0 m/s for 1 000 m and then travels at 50.0 m/s for the next 1 000 m.What is the average velocity?
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In one-dimensional motion where the direction is indicated by a plus or minus sign, the average velocity of an object has which of the following properties?
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An object moves 20 m east in 30 s and then returns to its starting point taking an additional 50 s.If west is chosen as the positive direction, what is the sign associated with the average velocity of the object?
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A cheetah can run at approximately 100 km/hr and a gazelle at 80.0 km/hr.If both animals are running at full speed, with the gazelle 70.0 m ahead, how long before the cheetah catches its prey?
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Displacement is which of the following types of quantities?
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A change in a physical quantity w having initial value wi and final value wf is given by which of the following?
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Which of the following is not a vector quantity?
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A cheetah can maintain its maximum speed of 100 km/hr for 30.0 seconds.What minimum distance must a gazelle running 80.0 km/hr be ahead of the cheetah to escape?
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A bird, accelerating from rest at a constant rate, experiences a displacement of 28 m in 11 s.What is the average velocity?
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Jeff throws a ball straight up.For which situation is the vertical velocity zero?
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