A record of travel along a straight path is as

follows.

1. Start from rest with constant acceleration

of 2:97 m=s2 for 14:8 s.

2. Constant velocity for the next 3:29 min.

3. Constant negative acceleration ¡9:1 m=s2

for 4:78 s.

What was the total displacement for the

complete trip? Answer in units of km