Anet force of 150 n left is applied to an object that accelerates at a rate of 300 m/s2 to the left. what is the mass of the object? a) 0.5 kg b) 2 kg c) 450 kg d) 45,000 kg

Newton #2 says     F  =  M a

Divide each side by ' a ' :

                             M  =  F / a

Plug numbers in:

                            M  =  (150 N) / (300 m/s²)

                                 =      0.5 kg .

Show him another sport or something

A) acceleration. this seems to be the one that makes sense.