please answer all 17) Ball A is dropped from the top of a building. One second l
ID: 1878924 • Letter: P
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please answer all
17) Ball A is dropped from the top of a building. One second later, ball B is rir speeds same building. Neglect air resistance. As time progr A) increases D) cannot be determined from the information given. esses, the difference in t heir speeds B) remains constant. C) decreases. 18) An object is moving with constant non-zero acceleration versus time graph of this object is A) a horizontal straight line. in the +x direction. The position B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve 19) An object is moving with constant non-zero velocity in the tx direction. The velocity versus time graph of this object is A) a horizontal straight line C) a straight line making an angle with the time axis B) a vertical straight line. D) a parabolic curve. 20) If the position versus time graph of an object is a horizontal line, the object is A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with increasing speed. 21) The motions of a car and a truck along a straight road are represented by the velocity-time graphs in the figure. The two vehicles are initially alongside each other at time t0. Truck At time T, what is true of the distances traveled by the vehicles since time r 0? A) They will have traveled the same distance B) The truck will not have moved. C) The car will have travelled further than the truck. D) The truck will have travelled further than the car. 22) Which of the following graphs represent an object having zero acceleration E) graphs c and d A) only graph a B) only graph b C) graphs a and b D) graphs b and c 23) The figure shows a graph of the position x of two cars, C and D, as a function of time . Copyright 2014 Pearson Education, Inc.Explanation / Answer
17. As the distance travelled by the dropped object relates directly proportional to square of the time, so distance between them keeps on increases.
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18. Curve must be parabolic
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19. As the velocity is constant so v-t graph must be straight horizontal line.
Option (a) is correct.
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20. It means the object is at same position.i.e at rest.
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Plz post other problems saperately.
Comment in case any doubt.. good luck
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