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.

that is probably false!

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2