please help me to solve this. A ship is being launched slides down the ways with the constant acceleration. She takes 4 seconds to slide the first meter. How long will she take to slide down the ways if their length is 900m?

Steelhead trout migrate up stream to spawn. occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b. leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?