ay = g = +9.80 m/52. The crucial point is that you must decide at the start whic

Question

ay = g = +9.80 m/52. The crucial point is that you must decide at the start which direction is positive, and then stick with your decision Practice Problem 2.10 Our first example of free-fall motion is very simple. A 2-euro coin is dropped from the Leaning Tower of Pisa. It starts from rest and falls freely. Ignore the effects of air resistance, and compute its position and velocity after 1.00 s, 2.00 s, and 3.00 s. Part A - Practice Problem: The coin is released 46.0 m above the ground. How much time is required for the coin to fall to the ground? Express your answer in seconds to three significant figures. I Figure 1 of 1 The Leaning Tower Our sketch for the problem 3.28 Submit My Answers Give Up Incorrect; Try Again; 19 attempts remaining -100s,y a,--g =-980 m/sz Part B- Practice Problem: 22.00s,Y2? What is its velocity just before it strikes the ground? Express your answer in meters per seconds to three significant figures. 4 3-300 s, y,-? n/s Submit My Answers Give Up Continue

Explanation / Answer

Here ,

part A) let the time taken is t

Using second equation of motion

h = 0.50 * a * t^2

46 = 0.50 * 9.8 * t^2

solving for t

t = 3.06 s

the time taken is 3.06 s

b) let the final velocity is v

Using third equation of motion

v^2 - 0^2 = 2 * 9.8 * 46

v = 30 m/s

the velocity just before it strikes the ground is 30 m/s

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