A particle's initial velocity is −24.0 m/s. Its final velocity, 3.10 seconds later, is −14.0 m/s. What was its average acceleration?
acceleration= (finalvelocity-initialvelocity)/time
= (-14-(-24))/3.10= 10/3.10 m/s^2
= (-14-(-24))/3.10= 10/3.10 m/s^2