don't understand what they want me to do
The next two questions concern the physical situation shown below. Two balls are are released from a table top of height H = 3m at the same time. The green ball is given an initial velocity v0 = 8 m/s in the downward direction, while the red ball is given an initial velocity v0 = 8 m/s in the upward direction.
https://online-s.physics.uiuc.edu/cg...02/01/hwb2.gif
Compare vbottom(red), the velocity with which the red ball strikes the floor with vbottom(green), the velocity with which the green ball strikes the floor
vbottom(red) < vbottom(green)
vbottom(red) = vbottom(green)
vbottom(red) > vbottom(green)
How long does it take for the red ball to reach the floor?
t = 0.38 s
t = 0.78 s
t = 1.65 s
t = 1.79 s
t = 1.95 s
Comment on Unknown008's post
So the red ball first moves in a parabola way, and then free fall, then how can I be sure about the time/distance the red ball has moved in that parabola way? So, in this case, do I take initial velocity as -8m/s?