Question

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. How long will the ball be in the air before it lands? Round your answer to the nearest tenth.

s




How far will the football travel before it lands? Round your answer to the nearest tenth.


m

Answer 1

See below

Step-by-step explanation:

vertical velocity=13.9 sin 25

When it hits the ground y = 0

0 = vo t - 1/2 a t^2

0 = 13.9 sin 25 t - 1/2 (9.81)t^2

0 = 13.9 sin 25 - 1/2 (9.81) t shows t = 1.1976 ~ 1.2 sec

horizontal speed x time = distance

13.9 cos 25 x 1.1976 =15 .1 meters