EXAM_I_REVIEW_SPRING_2011_CY_FAIR - Exam Review I Name...

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Exam Review I Name___________________________________ TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) Force is a vector quantity. 1) 2) Vector quantities are represented in terms of their magnitude and direction. T 2) 3) If A + B = 0, then the vectors A and B have equal magnitudes and are directed in the same direction. F 3) 4) The force of static friction between two surfaces is independent of the area of contact between the surfaces. T 4) 5) Free fall is the motion of an object subject only to the influence of gravity. T 5) 6) An object moving along a curved path with constant speed does not have a net force acting on it. F 6) 7) If A + B = C and A+B = C, then the vectors A and B are oriented perpendicular relative to one other. F 7) 8) The horizontal component of the velocity of a projectile remains constant during the entire trajectory of the projectile. T 8) 9) The mass of an object is fixed, but its weight varies from location to location. T 9) 10) A ball is thrown at an angle of Ό above the horizontal. If there is no acceleration due to gravity the ball will follow a straight - line path. T 10) 11) An object thrown downward does not experience free fall. F 11) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 12) If a vector A has components A x > 0, and A y > 0, then the angle that this vector makes with the positive x - axis must be in the range 12) A) 0° to 90°.XXX B) 90° to 180°. C) 180° to 270°. D) 270° to 360°. E) cannot be determined without additional information 1
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13) You drive 6.00 km at 50.0 km/h and then another 6.00 km at 90.0 km/h. Your average speed over the 12.0 km drive will be 13) A) exactly 38.0 km/h. B) greater than 70.0 km/h. C) less than 70.0 km/h.XXX D) equal to 70.0 km/h. E) cannot be determined from the information given, must also know directions traveled 14) When is the average velocity of an object equal to the instantaneous velocity? 14) A) only when the velocity is constantXXX B) only when the velocity is increasing at a constant rate C) only when the velocity is decreasing at a constant rate D) never E) always 15) Suppose that an object is moving with a constant velocity. Make a statement concerning its acceleration. 15) A) The acceleration must be constantly increasing. B) The acceleration must be equal to zero.XXX C) The acceleration must be constantly decreasing. D) The acceleration must be a constant non - zero value. E) A statement cannot be made without additional information. 16) The slope of a tangent line at a given time value on a velocity versus time graph gives 16) A) displacement. B) instantaneous velocity. C) instantaneous acceleration.XXX D) average acceleration. E) average velocity.
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EXAM_I_REVIEW_SPRING_2011_CY_FAIR - Exam Review I Name...

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