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25 September, 09:51

A ball is kicked from ground level with a velocity of 20 m/s at 30 degrees above the horizontal. Determine the horizontal displacement to where it lands and find how high the ball went at max height.

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  1. 25 September, 12:15
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    Answer:the horizontal displacement is 34.64 meters

    The maximum height is 15 meters

    Step-by-step explanation:

    As the ball moves from the ground at 30 degrees, it travels through a parabolic path. It can therefore be likened to a projectile. The horizontal displacement to where it lands is the range. The formula for determining range, R is

    R = U^2Sin2#) / g

    Where

    U represents the initial velocity of the ball

    g is acceleration due to gravity

    # represents the angle above the horizontal.

    From the information given

    # = 30 degrees

    U = 20 m/s

    g = 10m/s^2

    R = 20^2Sin2*30) / 10 = (400Sin60) / 20 = (400*0.8660) / 10

    = 34.64 meters

    To determine the maximum height of the ball, H,

    H = (U^2Sin^2#) / 2g

    H = (20^2 * Sin^2 30) / 2*10

    H = (400 * 0.866^2) / 20 = 15 meters
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