Provided is a diagram showing forces being applied by the engine, car and trailer.

what is the net force being applied?
question 5 options:

5000 n to the right

4000 n to the right

5000 n to the left

4000 n to the left

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

Is there any options, for this