Question

A player kicks a football at an angle of 37o with the horizontal and with an initial speed of 12 m/s. Calculate football's time of flight.
a. 14 s
b. 7.2 s
c. 1.5 s
d. 0.74 s

Answer 1

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Answer:

Angle of projection θ=30

0

initial velocity, μ=15 m/sec

a) Maximum height =

2g

μ

2

sin

2

θ

=

2×9.8

(15)

2

×sin

2

30

0

=2.869 m

b) Time of flight for projectile =

g

2μsinθ

=

9.8

2×15×sin30

0

=1.53 sec

c) Range =

g

μ

2

sin2θ

=

9.8

(15)

2

×sin60

0

=

9.8

225

×

2

3

=19.74 m