Asingle conservative force fx = (6.0x  12) n (x is in m) acts on a particle moving along the x axis. the potential energy associated with this force is assigned a value of +20 j at x = 0. what is the potential energy at x = 3.0 m?

Explanation:

Potential energy is minus the integral of Fdx.  Doing the integration yields:

so

Now for x=3.0m

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length