A diver runs horizontally off the end of a 3.0-m-high diving board with an initial speed of 1.8 m/s.Given that the diver's initial position is xi=0 and yi=3.0m, find her x positions at the times t = 0.25 s, t = 0.50 s, and t = 0.75 s.

Thank you for posting your question your question here. Below is the solution:
time = 3.00 / 1.75

time = 1.714

now

distance = (initial velocity + final velocity) / 2 * time/ 1

Hence

3 = ( 1.75 + final velocity) / 2 * 1.714

3.5 - 1.75 = final velocity

Therefore, the final velocity is 1.75 m /s

Answer Link

agaue agaue · Answer 2 · 2019-10-05T13:33:22+02:00

Answer:

At t = 0.25 s, x position = 0.45 m

At t = 0.50 s, x position = 0.90 m

At t = 0.75 s, x position = 1.35 m

Explanation:

At t = 0.25 s

Considering horizontal motion of diver:-

Initial velocity, u = 1.8 m/s

Acceleration , a = -0 m/s²

Displacement, s = ?

Time, t = 0.25 s

We have equation of motion s= ut + 0.5 at²

Substituting

s= ut + 0.5 at²

s = 1.8 x 0.25 + 0.5 x 0 x 0.25²

s = 0.45 m

x position = 0.45 m

At t = 0.50 s

Considering horizontal motion of diver:-

Initial velocity, u = 1.8 m/s

Acceleration , a = -0 m/s²

Displacement, s = ?

Time, t = 0.50 s

We have equation of motion s= ut + 0.5 at²

Substituting

s= ut + 0.5 at²

s = 1.8 x 0.50 + 0.5 x 0 x 0.50²

s = 0.90 m

x position = 0.90 m

At t = 0.75 s

Considering horizontal motion of diver:-

Initial velocity, u = 1.8 m/s

Acceleration , a = -0 m/s²

Displacement, s = ?

Time, t = 0.75 s

We have equation of motion s= ut + 0.5 at²

Substituting

s= ut + 0.5 at²

s = 1.8 x 0.75 + 0.5 x 0 x 0.25²

s = 1.35 m

x position = 1.35 m