Aforce f=(cx-3.00x2)i acts on a partical as theparticle
moves along an x axis, with f in newtons, x in meters andc a
constant..at x=0, the paricle's kinetic energy is 20.0 j; atx=3.00m
it is 11.0

The value of 'c' is 4.

Explanation:

We know from the basic relation between work and force is

Now since the energy of the particle changes from 20 Joules to 11 Joules  as position changes from  x=0 to x=3.00 thus applying the given vales in above relation we get

prolly a beacuse the momentuem the car has increases while going down hill

statement #3 on andre"s list is false.