all of the following questions: 1.) As a train accelerates away from a station, it reaches a speed of 4.7m/s in 5.4 s. If the train's acceleration remains constant, what is its speed after an additional 5.5 s has elapsed? Express answer in meters per sec 2.) A boat is cruising in a straight line at a constant speed of 2.2 m/s when it is shifted into neutral. After coasting 13 m the engine is engaged again, and the boat resumes cruising at the reduced constant speed of 1.2 m/s What was the speed of the boat when the boat had coasted for 6.5 m? 3.) A volcano launches a lava bomb straight upward with an initial speed of 26 m/s. a) Taking upward to be the positive direction, find the velocity of the lava bomb 2.0 seconds after it is launched b) Taking upward to be the positive direction, find the direction and motion of the lava bomb 2.0 seconds after it is launched. c) Taking upward to be the positive direction, find the velocity of the lava bomb after it is launched. d) Taking upward to be positive direction, find the direction of motion of the lava bomb 3.0 seconds after it is launched. 4.) Measure your reaction time. Here's something you can try at home- an experiment to measure your reaction time. Have a friend hold a ruler by one end, letting the other end hang down vertically. At the lower end, hold your thumb and index finger on either side of the ruler, ready to grip it. Have your friend release the ruler without warning. Catch it as quickly as you can. If you catch the ruler 7.6 cm from the lower end, what is your reaction time? 5.) The worlds highest water fountain of water is located, appropriately enough, in Fountain hills, Arizona. The fountain rises to a height of 560 ft Five ft higher than the Washington Monument). a) what was the initial speed of the water? b) how long does it take for water to reach the top of the fountain