What is the acceleration of a ball traveling horizontally with an initial velocity of 20 meters/second and, 2.0 seconds later, a velocity of 30 meters/second?
v o = 20 m / s ( initial velocity ) t = 2.0 s v = 30 m / s a - acceleration: v = v o + a t a t = v - v 0 a = ( v - v o ) / t a = ( 30 m/s - 20 m/s ) / 2 s = 10 m / s : 2 s = 5 m/s²
