Let's visualize the motion as follows:

During a baseball game, a baseball is struck at ground level by a batter. The ball leaves the baseball bat with an initial velocity v_{o} = 47 m/s at an angle θ = 21° above horizontal. Let the origin of the Cartesian coordinate system be the ball's position the instant it leaves the bat. Air resistance may be ignored throughout this problem

Express the magnitude of the ball's initial horizontal velocity v_{0x} interms of v_{0 }and θ

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intro to Projectile Motion: Horizontal Launch concept. You can view video lessons to learn Intro to Projectile Motion: Horizontal Launch. Or if you need more Intro to Projectile Motion: Horizontal Launch practice, you can also practice Intro to Projectile Motion: Horizontal Launch practice problems.