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An arrow is shot at an angle 32 degrees with the horizontal. It has a velocity of 46 m/s.?

An arrow is shot at an angle 32◦ with the horizontal. It has a velocity of 46 m/s.

How high will the arrow go? The acceleration of gravity is 9.8m/s^2

Answer in units of m

What horizontal distance will it travel?

Answer in units of m

Can you guys help me out?

Ive been trying to solve this for the past 30 mins and i cant figure it out

1 Answer

Relevance
  • 7 years ago

    Let’s determine the vertical and horizontal components of the velocity.

    Vertical = 46 * sin 32, Horizontal = 46 * cos 32

    As the arrow moves up to its maximum height, its vertical velocity decreases from 46 * sin 32 to 0 at the rate of 9.8 m/s each second. As the arrow falls from its maximum height, its vertical velocity increases 0 to 46 * sin 32 to 0 at the rate of 9.8 m/s each second. Since the distance up is equal to the distance down, the time up is equal to the time down. This means the total time is twice the time up. Let’s use the following equation to determine the time up.

    vf = vi + a * t, vf = 0, vi = 46 * sin 32, a = -9.8

    0 = 46 * sin 32 – 9.8 * t

    t = 46 * sin 32 ÷ 9.8 = 2.487376138 seconds

    Let’s use the following equation to determine the distance down.

    d = vi * t + ½ * a * t^2, vi = 0, a = 9.8, t = 46 * sin 32 – 9.8

    d = ½ * 9.8 * (46 * sin 32 ÷ 9.8)^2 = 30.31649626 meters

    This is the maximum height of the arrow.

    Let’s use the following equation to determine the horizontal distance.

    Horizontal distance = Horizontal velocity * total time

    Total time = 2 * 46 * sin 32 ÷ 9.8 = 92 * sin 32 ÷ 9.8 = 4.974752276 seconds

    Horizontal distance = 46 * cos 32 * (92 * sin 32 ÷ 9.8) = 194.0661431 meters

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