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Motion in one dimentsion

front 1 Acceleration is a. displacement b. the rate of change of displacement c. velocity d. the rate of change of velocity	back 1 d. The rate of change of velocity
front 2 When velocity is positive and acceleration is negative, what happens to the objects motion? a. the object slows down b. the object speeds up c. nothing happens to the object d. the object remains at rest	back 2 a. the object slows down
front 3 Acceleration due to gravity is also called a. negative velocity b. displacement c. free-fall acceleration d. instantaneous velocity	back 3 c. free fall acceleration
front 4 A baseball catcher throws a ball vertically upward and catches it at the same spot as it returns to the mitt. At what point in the ball's path does it experience zero velocity and nonzero acceleration at the same time? a. midway on the way up b. at the top of its trajectory c. at the instant it leaves the catchers hand d. the instant before it arrives at the catcher's mitt.	back 4 b. at the top of its trajectory

front 5 When there is no air resistance, objects of different mass a. fall with equal acceleration with equal displacements b. fall with different accelerations with different displacements c. fall with equal acceleration with different displacements d. fall with different accelerations with similar displacements	back 5 a. fall with equal acceleration with equal displacements.
front 6 Which would hit the ground first if dropped from the same height in a vacuum, a feather or a metal bolt? a. the feather b. the bolt c. they would hit the ground at the same time d. they would be suspended in a vacuum	back 6 c. they would hit the ground at the same time
front 7 Which would fall with greater acceleration in a vacuum, a leaf or a stone? a. the leaf b. the stone c. they would accelerate at the same rate d. it is difficult to determine without more information	back 7 c. they would accelerate at the same rate.
front 8 If an object has constant acceleration, its a. displacement changes at a constant rate b. velocity changes at a constant rate c. acceleration changes at a constant rate d. acceleration must be zero	back 8 b. velocity changes at a constant rate

front 9 When someone flies completely around the world: a. they have traveled a great displacement b. they have traveled no total distance c. they have traveled no total displacement d. their distance traveled and displacement are equal	back 9 c. they have traveled no total displacement
front 10 In a graph of displacement vs time, the slope of the line at any point: a. is the displacement b. is the velocity c. is the acceleration d. has no physical significance	back 10 b. is the velocity
front 11 The area under the velocity-time graph between any two time intervals is a. the displacement b. the velocity c. the acceleration d. has no physical significance	back 11 a. the displacement.
front 12 A ball is thrown vertically upward near the surface of the Earth. While the ball is upward its acceleration is a. 0 b. in the same direction as its velocity c. opposite to its velocity d. equal to its change in velocity e. in the same direction as its displacement	back 12 c. opposite to its velocity

front 13 A ball is thrown vertically downward near the surface of the Earth. While the ball is going downward its acceleration is a. 0 b. in the same direction as its velocity c. opposite to its velocity d. equal to its change in velocity e. in the same direction as its initial velocity	back 13 b. in the same direction as its velocity
front 14 A ball is thrown vertically upward near the surface of the Earth. While the ball is at maximum altitude its acceleration is a. 0 b. in the same direction as its velocity c. opposite its velocity d. equal to its change in velocity e. opposite to its displacement	back 14 e. opposite to its displacement
front 15 A racecar traveling in a straight line with a negative velocity experiences a positive acceleration. The speed of the racecar a. increases b. decreases c. remains constant	back 15 c. decreases
front 16 A stone is thrown straight up and reaches a height H before falling back to the ground T seconds later. Its average velocity during the time T is a. 0 b. H/2T c. H/T d. 2H/t	back 16 a. 0

front 17 A ball is thrown upwards. After it has left the had its acceleration a. remains constant b. decreases c. increases d. is zero	back 17 a. remains constant
front 18 An object is dropped from rest. If it falls a distance s1 during the first second and an additional distance s2 during the next second, the ratio s2/s1 is a. 1 b. 2 c. 3 d. 5	back 18 c. 3
front 19 A stone is thrown straight up and reaches a height H before falling back down to ground T seconds later. Its average speed during the interval T is a. 0 b. H/2T c. H/T d. 2H/t	back 19 d, 2H/T
front 20 A stone of mass m1 is dropped from the roof of a tall building. At the same instant, another stone of mass m2 is dropped from a window 10 m below the roof. The distance between the two stones during their flight a. decreases b. remains 10 m throughout c. increases d. depends on the ratio of m2/m1	back 20 b. remains 10 m throughout.