PrincesaJasmin7546 PrincesaJasmin7546 25-11-2022 Physics contestada Two carts with masses of 4. 0 kg and 3. 0 kg move toward each other on a frictionless track with speeds of 5. 0 m/s and 4. 0 m/s, respectively. The carts stick together after colliding head-on. Find the final speed.