SOLUTION: a fx and a bus is 30 km apart from each other their initial speed is 288 kph and 342 kph each. if the acceleration of the bus is 2.0 m/s^2 and 3.0 m/s^2 for the other vehicle. how

Question 1150099: a fx and a bus is 30 km apart from each other their initial speed is 288 kph and 342 kph each. if the acceleration of the bus is 2.0 m/s^2 and 3.0 m/s^2 for the other vehicle. how long is sec before both vehicle meet if they're travelling on the same direction
Answer by ikleyn(52799) (Show Source): You can put this solution on YOUR website!
.


Acceleration  of 1 m/s^2 changes the instantaneous velocity from 0 m/s to 3600 m/s, i.e. from 0 km/h to 36 km/h.



So, the acceleration of 2 m/s^2 changes the " fx "  instantaneous velocity (I don't know which vehicle it is) 

uniformly in time from 288 km/h to 288+72 = 360 km/h, with the average speed of   = 324 km/h.



Similarly, the acceleration of 3 m/s^2 changes the bus' instantaneous velocity 

uniformly in time from 342 km/h to 342+108 = 450 km/h, with the average speed of   = 396 km/h.


In the given problem, it is ACCEPTABLE to replace accelerated moves by uniform moves with averaged speeds.


Therefore, the answer to the problem's question is   =  =  of an hour = 25 minutes.   ANSWER

SOLVED.

RELATED QUESTIONS
Two cars run toward each other. Their speeds are 30 kph and 40 kph. At the moment when... (answered by ikleyn)

A car and a bus are 800 km apart. The speed of the car is 120 kph and the speed of the... (answered by richwmiller)

Firneed help urgent! 1. Two planes leave NAIA at 4 p.m., one traveling east at 850 kph (answered by Targetweek)

kindly solve these problems and please show the solutions: 1. two jet planes A and B... (answered by stanbon)

Two cars 240 km apart traveled toward each other at the same time. If the first car's... (answered by mananth)

[Two buses leave a station at the same time and travel in opposite directions. One bus... (answered by TimothyLamb)

Please help me on my homework. please correct my solutions and answers because i'm not... (answered by josmiceli)

An express train travels 150 km in the same time a tourist bus travels 120 km. If the bus (answered by mananth)

two cars left a gasoline station at the same time and headed in opposite direction. How... (answered by Cromlix,josmiceli)