An observer on the ground would describe the trajectory of the ball in part (a)
ID: 2169738 • Letter: A
Question
An observer on the ground would describe the trajectory of the ball in part (a) as:a parabola whose tangent line has negative slope.
a straight line sloped at an angle downward.
a parabola whose tangent line first has positive and then negative slope.
a vertical line downward.
a parabola whose tangent line has zero slope initially and later zero slope.
Consider the horizontal component of velocity relative to Earth and how it changes as time passes. What is its vertical component initially? What kind trajectory does the ball therefore follow as seen from the ground?
Explanation / Answer
a parabola whose tangent line first has positive and then negative slope. this is so because horizontal velocity will remain constant and vertical velocity first decreases due to negative acceleration and become zero and then gain increases in the negative direction