Problem 18 A football is punted at 23.0 m/s at an angle of 31.0 above the horizo
ID: 1879596 • Letter: P
Question
Problem 18 A football is punted at 23.0 m/s at an angle of 31.0 above the horizon. Assume it starts 1.00 m above ground level (Neglect any effects due to air resistance.) 1) What is the magnitude of vx of the ball when it is 5.00 m above ground level? (Express your answer to three significant figures.) 19.7 m/s Submit You currently have 1 submissions for this question. Only 10 submission are allowed. You can make 9 more submissions for this question. Your submissions: 19.7 V Computed value: 19.7 Feedback: Right answer ! Submitted: Sunday, September 16 at 11:56 AM 2) What is the magnitude of vy of the ball when it is 5.00 m above ground level? (Express your answer to three significant figures.) m/s Submit You currently have 3 submissions for this question. Only 10 submission are allowed You can make 7 more submissions for this question.Explanation / Answer
1)
horizontal component of velocity is nerver change because of in this direction there is no acceleration action on the ball so,
vox = vx = 23cos31 = 19.7 m/s
2) vy^2 - voy^2 = 2ay (y-yo)
vy = square root of {voy^2 + 2ay (y-yo)}
= square root of {(23sin31)^+2*(-9.8)*(5-1)}
vy =7.87 m/s