4. A 55g car slides down a perfectly smooth track starting at a height of 1.44m, at rest. At the bottom of the incline it strikes and sticks to a 280g car. The two cars are then free to move along a frictionless rollercoaster track. The first hill is only 26 cm high. Can it make it over this first hill? Defend your response with detailed analysis. EXTRA CREDIT: How fast is the car-combo moving at half this hill height