Abicycle takes 8.0 seconds to accelerate at a constant rate from rest to a speed of 4.0 m/s. if the mass of the bicycle and rider together is 85 kg, what is the net force acting on the bicycle?

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?