v = Vi + a t
23.4 = Vi + 8 t
average speed = (Vi+23.4)/2
so
t = 9.7/[ (Vi+23.4)/2 ]
so
23.4 = Vi + 8*9.7/[ (Vi+23.4)/2 ]
solve for Vi
A horse is running across a field. The horse accelerates at 8.00 m/s2 over a distance of 9.70 m. It runs until its speed is 23.4 m/s and continues at this speed. What was the horse's initial speed?
1 answer