Exercise 3.9 Part A A physics book slides off a horizontal table top with a spee
ID: 586594 • Letter: E
Question
Exercise 3.9 Part A A physics book slides off a horizontal table top with a speed of 1.80 m/s. It strikes the floor after a time of 0.430 s.lgnore air resistance. Find the height of the table top above the floor Express your answer with the appropriate units h = 0.906 m My Answers Give Up Correct Part B Find the horizontal distance from the edge of the table to the point where the book strikes the floor Express your answer with the appropriate units. z- 0774 m My Answers Give Up Correct Part C Find the magnitude of the horizontal component of the book's velocity just before the book reaches the foor Express your answer with the appropriate units.Explanation / Answer
along vertical
y = voy*t + 0.5*ay*t^2
-h = -0.5*g*t^2
t = sqrt(2h/g)
0.43 = sqrt(2h/9.8)
h = 0.91 m <<<<<<<<<<<------answer
+++++++++++++++++
along horizantal
x = vx*t = 1.8*0.43 = 0.774 m <<<<<<<<<<------answer
+++++++++++++++++++++
Vx = vox = 1.8 m/s <<<<<<<<<<------answer
+++++++++++++++++++++++++
vy = voy + ay*t
vy = 0 - 9.8*0.43 = -4.214 m/s <<----answer
magnitude = 4.214 m/s
++++++++++++
direction = tan^_1(vy/vx) = 67 degrees below the horizantal
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