Afootball player kicks a ball with an initial
velocity of 25 meters per second at an angle of
53° above the horizontal. the vertical component
of the initial velocity of the ball is
a.
25 m/s
b,
d.
20. m/s
10. m/s
c.
15 m/s

20 m/s

Explanation:

The vertical component of the initial velocity of the ball is given by:

where:

is the initial speed

is the angle of launch above the horizontal

In the problem we have

Substituting into the equation,

The vertical component  of the initial velocity of the ball is 20 m/s.

Explanation:

Given data:

Initial velocity is, u = 25 m/s.

Angle of inclination is, .

The vertical component of initial velocity is,

Solving as,

Thus, vertical component  of the initial velocity of the ball is 20 m/s.

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show the wavelengths of a wave. show the crests of a wave.

the answer is b, have negligible mass