A Tractor of Mass M₁ = 2,000 Kg Is Pulling

Multiple Choice

A tractor of mass M₁ = 2,000 kg is pulling a trailer of mass M₂ = 5,000 kg. If the tractor-trailer is accelerated at 2.0 m/s², and air resistance is negligible, then the magnitude of the force the tractor applies to the road is

A) 14,000 N.
B) 12,000 N.
C) 10,000 N.
D) 8,000 N.
E) 6,000 N.