Hi. Need an expert to answer these questions. Please answer all of them. Answer

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Hi. Need an expert to answer these questions. Please answer all of them.

Answer them correctly.

Please give me the answer with units and as the question wants and I just want the final answer. Be aware that I have to put the final answer in the rectangle that is under each the question and it will be corrected by a WebAssign system so please be sure to write the final answer correctly and circle it, please. Thanks!

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Question 1 Not complete Points out of 1.00 You throw a bal toward a wall with a velocity of 21.0m/s directed e-40.0 above the horizontal. The ball leaves your hand 2.00m above the ground and d=12.0m from the wall Fag question How far above the ground does the ball hit the wall? Answer Check Question 2 Not complete Points out of 1.00 What is the speed of the ball at the moment it hits the wall? Answer: Check Flag question Question 3 Not compiete Points out of 1.00 P Fag question What is the angle between the ball's velocity vector and the horizontal at the moment it hits the wall? Use 'deg for an angle in degrees or "rad' for an angle in radians Answer Check

Explanation / Answer

1. IN horizontal,

d = (v0x) t

12 = (21 cos40) t

t = 0.746 sec  

in vertical, yf - yi = v0y t + ay t^2 / 2

y - 2 = (21 sin40)(0.746) - (9.8 x 0.746^2 / 2)

y = 9.34 m

2. vx = v0x = 21 cos40 = 16.1 m/s

vy = v0y + ay t = (21 sin40) - (9.8 x 0.746)

vy = 6.19 m/s

v = sqrt(vx^2 + vy^2 ) = 17.2 m/s

3. theta = tan^-1(vy /vx)

= 21 deg

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