number 4 and 5 with complete solutions. Use the kinetics equation

Q 6 67 - 3) A stone is dropped into a deep well and is heard to hit the water after 3.41 s. Determine the depth of the well. 4) An object starts from a position of 20 meters to the left of the origin and with a velocity of +10 m/s. An object accelerates to the right for 5 seconds at 4 m/s. What is the position of the object at the end of 5 seconds? 5) An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s2. The takeoff speed for this plane will be 65 m/s. Assuming this minimum acceleration, what is the minimum allowed length for the runway? What I Have Learned