Question

?

Answer 1

using one of the kinematics equations

vf = vi + at

where vf is the final velocity (0 since we're stopping) vi is the initial velocity, t is time and a is acceleration, solve for time

Answer 2

0 = 13 + at

Answer 3

good, keep going (you are also given acceleration)

Answer 4

0 = 13 +( -3.1)t

Answer 5

good, solve for t

Answer 6

C 4.2

Answer 7

good, that's it