Asoccer ball is kicked with a speed of 8.50 m/s at an angle of 28.0° above the horizontal. if the ball lands at the same level from which it was kicked, how long was it in the air? (neglect air resistance.)

Upward velocity at launch= 8.50*sin280

                                                                   8.50×0.4694

                                         =3.989

Time taken to reach maximum height=v/g

                                      =3.9899/9.8

Same speed to needed to come down,

So, time in air= 3.9899/4.9

                     =0.81 sec

your answer is

a.

5

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