Express the mass of car.

W=mg (I)

Here, weight and mass of car is W and m respectively, and acceleration due to gravity is g.

Conclusion:

Substitute 32.2 ft/s2 for g and 3500 lb for W in Equation (I)

3500 lb=m(32.2 ft/s2)m=108.6 slugs

Hence, the mass of car is 108.6 slugs.

Express the weight of car.

W=3500 lb=3500 lb[4.4482 Nlb]=15568.7 N[kN1000 N]=15.568 kN

Hence, the weight of car is 15.568 kN.

Express the mass of car.

m=108.6 slugs=108.6 slugs[14.5939 kgslugs]=1584.89 kg

Hence, the mass of car is 1584.89 kg.