Two cars travel along a straight road. When astopwatch reads t = 0.00 h, car A i
ID: 1681355 • Letter: T
Question
Two cars travel along a straight road. When astopwatch reads t = 0.00 h, car A is atdA = 48.0 km moving at a constant 35.0 km/h. Later, when the watch reads t =0.50 h, car B is at dB = 0.00 km moving at51.0 km/hr. Answer the followingquestions, first, graphically by creating a position-time graph,and second, algebraically by writing down equations for thepositions dA and dB as afunction of the stopwatch time, t. (a) What will the watch read when car B passescar A? (b) At what position will car B pass carA? (c) When the cars pass, how long will it havebeen since car A was at the reference point? I have solved this problem a fewtimes and each time it has been wrong. The first answer that I knewwas wrong was; (a)3.5 hr (b) 153km (c) 4 hr The second one, and one that Ithought was right, I put; (a) 9.75 h (b) 389.25 km (and didnt bother doing part cbecause the first two were wrongTwo cars travel along a straight road. When astopwatch reads t = 0.00 h, car A is atdA = 48.0 km moving at a constant 35.0 km/h. Later, when the watch reads t =0.50 h, car B is at dB = 0.00 km moving at51.0 km/hr. Answer the followingquestions, first, graphically by creating a position-time graph,and second, algebraically by writing down equations for thepositions dA and dB as afunction of the stopwatch time, t. (a) What will the watch read when car B passescar A? (b) At what position will car B pass carA? (c) When the cars pass, how long will it havebeen since car A was at the reference point? I have solved this problem a fewtimes and each time it has been wrong. The first answer that I knewwas wrong was; (a)3.5 hr (b) 153km (c) 4 hr The second one, and one that Ithought was right, I put; (a) 9.75 h (b) 389.25 km (and didnt bother doing part cbecause the first two were wrong
The second one, and one that Ithought was right, I put; (a) 9.75 h (b) 389.25 km (and didnt bother doing part cbecause the first two were wrong