Football player kicks a ball

Let us know what happens when football player kicks a ball. In this post we understand all component which affects the best play in a football match by Physics laws by an example.

When player kicks a ball with an Example

A football player kicks a ball at angle of 37⁰ to the horizontal with an initial speed of 15 m/sec. Assuming that the ball travels in a vertical plane, calculate (a) the time at which ball reaches the highest point (b) the maximum height reaches (c) the horizontal range of the ball (d) the time for which the ball is in air.

Solution:

Football player kicks a ball
Football player kicks a ball
  • Time taken by the ball to reach the highest point (u sin θ)/g = (15 x sin 37⁰)/9.8 = 0.92 sec.
  • Maximum height reached

H max = (u2sin2 θ)/2g = (15)2(sin 37⁰)2/2 x 9.8 = 4.16 m

  • The horizontal range of the ball

R = u2 sin 2 θ /g = (15)2 sin (2 x 37⁰)/9.8 = 21.2 m

  • Time for which the ball is in air

T = 2u sin θ /g = 2 x 15 sin 37⁰ /9.8 = 1.84 sec

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