A football is thrown horizontally with an initial velocity of (14.8 m/s)x. Ignor

Question

A football is thrown horizontally with an initial velocity of (14.8 m/s)x. Ignoring air resistance, the average acceleration of the football over any period of time is (-9.81 m/s2)y. Calculate the velocity vector of the ball 1.56 s after it is thrown. Give the answer in term of the x- and y-components. Enter the x-component first.

Tries 0/99
Calculate the magnitude of the velocity at this time.

Tries 0/99
Calculate the direction of the velocity with respect to the positive x-axis at this time. Use positive as up and negative as down.

Explanation / Answer

the ball is thrown horizontally, hence its initial vertical velocity would be 0. Since we are ignoring the air resistance, the horizontal component of velocity would remain same, since the football is not accelerating in the horizontal direction. However there is an acceleration is the vertical direction known as the gravitational acceleration due to which the vertical component of velocity will change. in order to find the vertical component at the specified time, use the first equation of motion vf

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