Question

a car traveling at 28.8 m/s skids to a stop in 5.10s determine the acceleration

Answer 1

Hola mate.....here is your answer....

The car finally stops that means it is at rest at last.

final velocity = 0
.
according to first Kinematical equation ,

V = U + at

but the speed is retarded , so "a" will be negative.

V = U - at

but , V = 0.

so ,. U = at

a =. U ÷ t

a =. 28.8 ÷ 5.10


$28.8 \div 5.10 = 5.64 \: \ \: m \: per \: sec \: square$

hope u understood ^_^