nya rassignmentProblemlD n item view =84677386 03HY Problem 3 63 e previcuS Prob

Question

nya rassignmentProblemlD n item view =84677386 03HY Problem 3 63 e previcuS Problem 3.63 Part A A football punter wants to kick the ball so that it is in the air for 4.5 s and lands 55 m from where it was kicked. Assume that the ball leaves 1.0 m above the ground At what angle should the ball be kicked? Express your answer using two significant figures. Submit My Answers Give Up Part B With what inisial speed should the ball be klcked? Express your answer to two significant figures and include the appropriate units Value Units My Aaswers Give Up Provide Eeedback

Explanation / Answer

here,

let the initial velocity be v and the angle be theta

for vertical direction

h = - v * sin(theta) * t + 0.5 * g * t^2

1 = - v * sin(theta) * 4.5 + 0.5 * 9.81 * t^2 .....(1)

and

for horizontal direction

v * cos(theta) * t = x

v * cos(theta) * 4.5 = 55 ....(2)

from (1) and (2)

v = 25.04 m/s

theta = 60.8 degree

a)

the angle is 60.8 degree

b)

the initial speed is 25.04 m/s

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