Question

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?

Answer 1

A) 3.3m

B)  1.36 sec

Explanation:

Cause I know its right

Answer 2

Part a)

since steelhead jump under the influence of gravity

So we will use kinematic equations

$v_f^2 - v_i^2 = 2ad$

here at the maximum position we know that final speed will be zero

$v_f = 0$

$a = -9.8 m/s^2$

$v_i = 8m/s$

now we will have

$0 - 8^2 = 2(-9.8)d$

$d = 3.26 m$

so the maximum height that it can reach will be 3.26 m

Part B)

now if it reaches to height 1.8 m with initial speed 8 m/s

so here we will have

$y = v_i t + \frac{1}{2}at^2$

$1.8 = 8 t - \frac{1}{2}(9.8)t^2$

$4.9 t^2 - 8t + 1.8 = 0$

$t = 0.27 s$