- #1

luffy3san

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## Homework Statement

A soccer ball with a mass of 416 g bounces off the crossbar of a goal and is deflected upward at an angle of 56.7° with respect to horizontal. Immediately after the deflection, the kinetic energy of the ball is 46.9 J. What are the vertical and horizontal components of the ball's momentum immediately after striking the crossbar? (Let the horizontal direction be the x-direction and the vertical direction be the y-direction.)

## Homework Equations

P = mv

KE = 1/2mv

^{2}

## The Attempt at a Solution

KE

_{f}= 0.5 * m * v

^{2}

46.9 = 0.5 * 0.416 * v

^{2}

v = 15 m/s

P = mv

Px = 0.416 kg * 15 m/s * cos 56.7 degrees = 3.43 kg m/s

Py = 0.416 kg * 15 m/s * sin 56.7 degrees = 5.22 kg m/s

Any help is appreciated. Thanks.

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