A football player, starting from rest at the line of scrimmage, accelerates along a straight line for a time of 1.5 s. Then, during a negligible amount of time, he changes the magnitude of his acceleration to a value of 1.4 m/s2. With this acceleration, he continues in the same direction for another 1.2 s, until he reaches a speed of 3.4 m/s. What is the value of his acceleration (assumed to be constant) during the initial 1.5 s period?
Physics - bobpursley, Sunday, September 26, 2010 at 4:23pm
Well,this is a math exercise more than physics.
Compute the value of Vf at the end of each period, and use that as the Vi for the next period.
solve the last equation for a.
Physics - Amanda, Sunday, September 26, 2010 at 4:46pm
Thanks, it really helped