The sum of all the forces acting on an object can be described mathematically by

where m is the mass of the object (in kg) and a is the acceleration felt by the object (in m/s
2) as a result of the forces (in newtons, N) acting on it. What is the force required to accelerate a 5 kg object at

◦ 5 N
◦ 45 N
◦ 14 N
◦ 81 N