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,then 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.