Answer:
the speed of the apple half way between the release and the maximum height is not half the initial speed due to the acceleration due to gravity numerically equal to 9.81 m/s2. An acceleration in the direction of motion of a body will cause its velocity to increase, thus, this acceleration due to gravity increases the velocity of the apple so that it will be at its maximum speed before hitting the ground.
The value of this acceleration implies that there is an increase of 9.8 m/s in its speed for every one seconds of fall. This means that at 1 sec when it starts to fall, the speed will be 9.8 m/s. By two seconds it becomes 19.62 m/s. It is clear to see that the velocity halfway will be more than its initial velocity.
I believe the answer would be "Different Colors," hope this helps :)
In order to calculate his velocity for the whole session, we need to know ...
(1). the straight-line distance from the start-point to the end-point;
(2). the direction from start-point to end-point
(3). the elapsed time from start to finish
We could find (1) and (2) if we knew how much time he spent on each segment of the training run. Then we could calculate the distance covered on each segment, and construct the straight-line displacement and direction of the whole thing.
For (3), no time information is given anywhere in the question, so it's pretty hard to come up with a total time.
We definitely have to mark this one "<em>INSUFFICIENT GIVEN INFORMATION</em>". We just don't have what we need in order to solve it.
