A football punter wants to kick the ball so that it is in the air for 4.2 s and lands 55 m from where it was kicked. Assume that the ball leaves 1.0 m above the ground. Part A: At what angle should the ball be kicked?
Part B: With what initial speed should the ball be kicked?

24.21 m/s

Explanation:

x = Displacement in x direction = 55 m

y = Displacement in x direction = 0

= Height of the ball when the ball is kicked = 1 m

t = Time taken = 4.2 s

= Acceleration due to gravity =

u = Initial velocity of ball

Displacement in x direction is given by

Displacement in y direction is given by

The ball should be kicked at an angle of

The initial speed of the ball is 24.21 m/s.

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.