Question

A boy runs straight off the end of a diving platform at a speed of 4.40 m/s. The platform is 12.4 m above the surface of the water. 1) Calculate the boy’s speed when he hits the water. (Neglect any effects due to air resistance.) (Express your answer to three significant figures.)

2)

How much time is required for the boy to reach the water? (Neglect any effects due to air resistance.) (Express your answer to three significant figures.)

3)

How far horizontally will the boy travel before he hits the water? (Neglect any effects due to air resistance.) (Express your answer to three significant figures.)

Answer 1

2)

Time required to reach the water, is calculated above as the value of t

t = 1.59 s

3)

Horizontal equation of motion, X= u_xt = 4.4 x 1.59 m = 6.996 m

Rounding off to three significant figures, the final answers

1) v = 16.2 m/s

2)  t = 1.59 s

3) X = 7.00 m