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  4. Problem 27
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Question: 

A projectile is fired with an initial speed of 36.6 m/s at an angle of $42.2^\circ$ above the horizontal on a long flat firing range. Determine

  1. the maximum height reached by the projectile,
  2. the total time in the air,
  3. the total horizontal distance covered (that is, the range), and
  4. the speed of the projectile 1.50 s after firing.

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 
  1. $30.8\textrm{ m}$
  2. $5.02\textrm{ s}$
  3. $136\textrm{ m}$
  4. $28.9\textrm{ m/s}$

Giancoli 7th Edition, Chapter 3, Problem 27

(5:12)

Comments

By shichunye on Tue, 02/28/2017 - 13:37

1. why is it 36.6m/s(sin42)-(9.80)(1.50), doesnt the equation say V0sin+ayt?

2. how did you obtain 27.113m/s^2 for Vx?