Acceleration in one dimension Name HW-1 7. Two cars, C and D, travel in the same
ID: 1878919 • Letter: A
Question
Acceleration in one dimension Name HW-1 7. Two cars, C and D, travel in the same direction on a long, straight section of highway. During a car D is ahead of car C and is speeding up while car C is slowing particular time inten al down. During the intenal , it is observed that car C gains on car D (ie, the distance between the cars decreases). Explain how this is possible, and give a specific example of such a case. 8. Two cars, P and Q, travel in the same direction on a long, straight section of a highway. Car passes car Q, and is adjacent to car Q at time a. Suppose that car P and car Qeach move with constant speed. At time t is the magnitude of the instantaneous velocity of car P greater than, less than, or equal to the magnitude of the instantaneous velocity of car Q? Explain. Suppose instead that car P is moving with constant speed but car Q is speeding up. At time is the magnitude of the instantancous velocity of car P greater than, less than, or equal to the magnitude of the instantaneous velocity of car Q? Explain. b.Explanation / Answer
7)
If car D is ahead and speeding up, and car C is slowing down but the gap decreases then how must the velocities of the two compare? That is, which has the greater velocity?
Hence Car C gaining on car D.