Physics

Suppose a soccer player kicks the ball from a distance 30 m toward the goal. Find the initial speed of the ball if it just passes over the goal, 2.4 m above the ground, given the initial direction to be above the horizontal.

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  1. 40 degrees*

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  2. [v sin40]^2 = 2 (9.8) 2.4. This assumes vy final is zero as it crosses the goal.
    v = sqrt(2*9.8*2.4)/sin40

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  3. 10.67 m/s

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  4. Suppose a soccer player kicks the ball from a distance 15 m toward the goal. Find the initial speed of the ball if it just passes over the goal, 2.4 m above the ground, given the initial direction to be 35° above the horizontal.

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