plz help with acceleration work! simple! hello im new here and will probably be here a lot if this goes well. im taking a college physics class and cannot figure out a few problems: 1. Coasting due south on your bicycle at 8.0 m/s, you encounter a sandy patch of road 6.4 m across. When you leave the sandy patch your speed has been reduced to 6.7 m/s. Assuming the bicycle slows with constant acceleration, what was its acceleration in the sandy patch? Give both magnitude and direction. 2. A 747 airliner reaches its takeoff speed of 168 mi/h in 34.9 s. What is the magnitude of its average acceleration? 3. Running with an initial velocity of +13 m/s, a horse has an average acceleration of -1.81 m/s2. How long does it take for the horse to decrease its velocity to +5.0 m/s? 4. As a train accelerates away from a station, it reaches a speed of 5.2 m/s in 5.0 s. If the train's acceleration remains constant, what is its speed after an additional 7.0 s has elapsed? thanks for all your help!