to qualify for a race, a car must average 350 km/hr for four laps. If a driver averages 285 km/hr for the first two laps, what average speed must be achieved for the final two laps in order to qualify?
physics - bobpursley, Tuesday, September 25, 2012 at 9:02pm
time for first two time2=distance/285=2laps/285
time for last two laps=2laps/V
V=350*285/(2*285-350) and you can finish it.
physics - Anonymous, Monday, September 19, 2016 at 3:54pm