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3 March, 15:00

An arrow is shot at a 30 degrees angle with the horizontal. It has a velocity of 49 m/s. How high up does it go?

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  1. 3 March, 15:26
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    First, determine how much of that 49m/s applies towards vertical velocity. So just multiply by the sine of 30. Giving

    sin (30) * 49 m/s = 0.5 * 49 m/s = 24.5 m/s

    Now the arrow will continue to climb until it's vertical velocity reaches 0. And since the attraction due to gravity is 9.8 m/s^2, that will be

    24.5 m/s / 9.8 m/s^2 = 2.5 s

    Finally, the distance an object travels under constant acceleration is given by the equation

    d = 0.5 A T ^2

    where

    d = distance

    A = acceleration

    T = time.

    So substitute the known values into the equation and solve for d.

    d = 0.5 9.8 m/s^2 (2.5 s) ^2

    d = 4.9 m/s^2 * 6.25 s^2

    d = 30.625 m
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