Aball is kicked horizontally off a cliff with an initial speed of 6 m/s and lands 12 m from the base of the cliff. for
how many seconds was the ball in the air? use a=9.8m/s2 for acceleration due to gravity.(enter only the number)

Answer

The time for ball in the air is, t = 2 s

Explanation:

Given,

The initial speed of ball, v = 6 m/s

The ball lands at a distance from the cliff are, S = 12 m

Since the ball is launched from a height 'h' horizontally with an angle θ = 0

Therefore, the initial vertical component of velocity Vy = 0

The initial horizontal component of velocity, Vx = 6 m/s

To find the height of the cliff, let us use the range formula

                        S = Vx · [Vy + √(Vy² + 2gh) ] / g       meter

Since Vy = 0; squaring both sides and solving for h

                        g²S² = Vx² + Vy² + 2gh

                            h = S²g / 2Vx²       meter

Substituting the given values in the above equation

                             h =  (12² x 9.8) / (2 x 6²)

                                = 19.6 m

Therefore the height of the cliff is 19.6 m

To find the time of flight, the formula h > 0 is

                             t = [Vy + √(Vy² + 2gh) ] / g      second

Since Vy = 0

                             t = √(2h/g)     second

Substituting the values in the above equation

                             t = √(2 x 19.6 / 9.8)

                               = 2 s

Hence, the time for the ball in air is, t = 2 s                                

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).