1- A powerful motorcycle can produce an acceleration of 3,7 m/s^2while traveling at 90.0 km/h. At that speed the forces resisting motion, including friction and air resistance, total 400 N. (Air resistance is analogous to air friction. It always opposes the motion of an object.) What is the magnitude of the force, in Newtons, that the motorcycle exerts backward on the ground to produce its acceleration if the mass of the motorcycle with rider is 244 kg?

2- A cleaner pushes a 3,5-kg laundry cart in such a way that the net external force on it is 69 N. Calculate the magnitude of its acceleration in m/s2.