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Author Question: A projectile is fired at an angle of elevation of 30. Neglecting air resistance, what are possible ... (Read 125 times)

dalyningkenk

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on: Jul 28, 2018
A projectile is fired at an angle of elevation of 30. Neglecting air resistance, what are possible angles in flight between the acceleration vector and the velocity vector?
 a. 160 and 40
  b. 20 and 70
  c. 90 and 30
  d. none of the above
  e. 10 and 30

Question 2

A projectile is launched at an angle  above the horizontal. Three seconds later the projectile is moving the same angle  below the horizontal. Which of the following (actual values with units, not just algebraic symbols) can be found from the information given?
 a. the initial vertical component of the projectile's velocity
  b. the initial horizontal component of the projectile's velocity
  c. the initial magnitude of the velocity
  d. None of the above since at least one of the above must be given to find the other two values.


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Dnite

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Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

a


dalyningkenk

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Reply #2 on: Jul 28, 2018
Thank you!


Dnite

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Reply #3 on: Jul 28, 2018
Always glad to help...


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