True or false: dimensional analysis can give you the numerical value of constants of proportionality that may appear in an algebric expression

This is false.

By essence, dimensional analysis only gives you an information on the different physical parameters and constants that will appear in a formula, up to a dimensionless constant of proportionality of unknown value.

The car would move to the right with 150 n of force. the 150 n of force from friction and air resistance slows the car from moving to the right with 300 n of force.