D. adding one student to the team on the left
Acceleration =change in velocity/change in time.
So final speed minus initial velocity/time
3.1-v/2=a
Given parameters:
Initial velocity of eraser = 5.0m/s
Time = 7.0s
Unknown:
Final velocity = ?
Solution:
Since we have been given the initial velocity and duration of the throw, we can apply the appropriate motion equation to solve this problem.
V = U - 2gt
where V is the final velocity
U is the initial velocity
g is the acceleration due to gravity = 9.8m/s²
t is the time taken
V = U - gt
V = 5 - (9.8)(7)
V = -63.6 or -64m/s
The velocity is -64m/s
In the sport of volleyball a server is in the "back left position" for standard rules.
Hope I helped,
-CSX :)
