Kinematics in two dimensions Focus on Concepts, Question 03 Focus on Concepts, Q

Question

Kinematics in two dimensions Focus on Concepts, Question 03 Focus on Concepts, Question 04 Focus on Concepts, Question 14 Chapter 03, Problem 002 Chapter 03, Problem 03 GO Chapter 03, Problem 06 Chapter 03, Problem 11 Chapter 03, Problem 23 Chapter 03, Problem 26 GO Review Score Review Results by Study Objective In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0336 s, during which time R, experiences an acceleration of 320 m/s^2. The ball is launched at at an angle of 52.7 degree above the ground. Determine the horizontal and vertical components of the launch velocity. Number Units Number Units

Explanation / Answer

kinematic equation

the velocity of the foot ball is v = at

                                             =320 m/s2*0.0336 s

                                              = 10.752 m/s

a)

    the magnitude of the horizontal componet ofvelocity is

               vx = vcos

vx= 10.752 cos 52.7 = 6.515 m/s

b)

the magnitude of the vertical componet of velocity is

               vy = vsin

vy= 10.752 sin52.7 = 8.553 m/s

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