The top of the trajectory is the point where it changes from rising to falling. At that exact instant, its vertical speed is zero.
Work is considered as the Force performed on a body to move it a certain distance, that is
W = Fd
Here
W = Work
F = Force
d = Distance
In this case we have the values of work and distance, therefore clearing for the Force we would have to

Replacing,


Therefore the force that Marissa must exert on the windows shade is 0.4N
Answer:
The maximum height the child can jump on the stick
h=0.459m
Explanation:
Energy conservation
Energy kinetic = Work
The energy the child do get the height jump is proportional at the distance and the consta can be compressed so:
