Basic Kinematics HW questions for AP Physics

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SUMMARY

The discussion focuses on a kinematics problem involving a soccer player kicking a ball at an angle of 42 degrees with an initial velocity of 18 m/s. The objective is to determine the speed at which the receiver must catch the ball before it hits the ground, given that the receiver is 46 meters away. Key steps include identifying the relevant kinematic equations, calculating the maximum height, and determining the horizontal and vertical components of the initial velocity.

PREREQUISITES
  • Kinematic equations for projectile motion
  • Understanding of vector components (horizontal and vertical velocities)
  • Basic trigonometry for angle calculations
  • Knowledge of gravitational acceleration (9.81 m/s²)
NEXT STEPS
  • Study the derivation and application of the kinematic equations for projectile motion
  • Learn how to resolve vectors into horizontal and vertical components
  • Explore the concept of maximum height in projectile motion
  • Practice solving similar problems involving angles and distances in physics
USEFUL FOR

This discussion is beneficial for high school students preparing for AP Physics, educators teaching kinematics, and anyone interested in understanding projectile motion principles.

cntower
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Homework Statement


A soccer player kicks a ball at an angle of 42 degrees to the horizontal. The ball leaves his foot with a velocity of 18m/s. The player that receives this ball is standing 46m from the kicker. How fast does the reciever need to receive the ball befor eit hit's the ground?

Homework Equations





The Attempt at a Solution


Well. I tried by first figuring out the Max height the ball will be at...then I am lost.
 
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cntower said:

Homework Statement


A soccer player kicks a ball at an angle of 42 degrees to the horizontal. The ball leaves his foot with a velocity of 18m/s. The player that receives this ball is standing 46m from the kicker. How fast does the reciever need to receive the ball befor eit hit's the ground?

Homework Equations





The Attempt at a Solution


Well. I tried by first figuring out the Max height the ball will be at...then I am lost.

Welcome to the PF. List the relevant kinematic equations that you should use. Draw a diagram and use that to help you figure out the horizontal and initial vertical velocities...
 

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