molly.blyndeffLv1

25 Sep 2021

Question 9 (10 points)

Skydivers are affected by acceleration due to gravity and by air resistance. Eventually, they reach a speed where the force of gravity is almost equal to the force of air resistance. As they approach that point, their acceleration decreases in magnitude to near zero.

   Part A. Describe the shape of the graph of the magnitude of the acceleration versus time for a falling skydiver.

   Part B. Describe the shape of the graph of the magnitude of the velocity versus time for a falling skydiver.

   Part C. Describe the shape of the graph of the magnitude of the displacement versus time for a falling skydiver.

⚪ a    Part A. Begins with a nonzero y-intercept with a downward slope that levels off at zero: Part B. Begins at zero with an upward slope that decreases in magnitude until the curve levels off, Part C. Begins at zero with an upward slope that increases in magnitude until it becomes a positive constant

⚪ b    Part A. Begins with a nonzero y-intercept with an upward slope that levels off at zero; Part B. Begins at zero with an upward slope that decreases in magnitude until the curve levels off; Part C. Begins at zero with an upward slope that increases in magnitude until it becomes a positive constant

⚪ c    Part A. Begins with a nonzero y intercept with a downward slope that levels off at zero; Part B. Begins at zero with a downward slope that decreases in magnitude until the curve levels off; Part C. Begins at zero with an upward slope that increases in. magnitude until it becomes a positive constant

⚪ d    Part A. Begins with a nonzero y-intercept with an upward slope that levels off at zeros Part B. Begins at zero with a downward slope that decreases in magnitude until the curve levels off: Part C. Begins at zero with an upward slope that increases in magnitude until it becomes a positive constant

 

Question 10 (10 points)

Which graph in the previous problem has a positive slope?

⚪ a    Displacement versus time only

⚪ b    Acceleration versus time and velocity versus time

⚪ c    Velocity versus time and displacement versus time

⚪ d    Acceleration versus time and displacement versus time