what is the sum of the following four FULL SCREEN PRENTER VERSN BACKNEXT Chapter

Question

what is the sum of the following four FULL SCREEN PRENTER VERSN BACKNEXT Chapter 02, Problem 050 Z Your answer is partially correct. Try again. At time t = 0 s, apple 1 is dropped from a bridge onto a roadway beneath the bridge; somewhat later, apple 2 is thrown down from the same height. The figure gives the vertical positions y of the apples versus t during the falling, until both apples have hit the roadway. The scaling is set by t-2.0s. With approximately what speed is apple 2 thrown down? 25 Number 21.04 Units ms the tolerance is +/-3%

Explanation / Answer

For Apple 1:

v0 = 0

a = - g

t = 2 s

Applying yf - yi = v0 t + a t^2 /2

0 - h = 0 - g (2^2)/2

h = 2g

For apple 2:
  
v0 = ?

t = 2.25 - 1 = 1.25 s

a = - g

0 - h = v0 (1.25) + (-g)(1.25^2)/2

- 2 g = 1.25 v0 - 0.78125 g

v0 = - 1.21875 g  

v0 = - 11.9 m/s

velocity is 11.9 m/s downward

Ans: Speed = 11.9 m/s

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