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Complete Question
The complete question is is shown on the first uploaded
Answer:
The elastic potential energy at point B is
The kinetic energy at point D is
Explanation:
Looking at the given point we can observe that mechanically energy(i.e potential and kinetic energy ) is conserved and it value is
So at point B
KE at point B is 50J
So
Now at point D
at point D is 25J
So
Answer:
If max height = 1.1 meters, then initial velocity is 3.28 m/s
If max height is 1.1 feet, then the initial velocity is 5.93 ft/s
Explanation:
Recall the formulas for vertical motion under the acceleration of gravity;
for the vertical velocity of the object we have
for the object's vertical displacement we have
If the maximum height reached by the object is given in meters, we use the value for g in which is:
If the maximum height of the object is given in feet, we use the value for g in which is :
Now, when the ball reaches its maximum height, the ball's velocity is zero, so that allows us to solve for the time (t) the process of reaching the max height takes:
and now we use this to express the maximum height in the second equation we typed:
Then if the max height is 1.1 meters, we use the following formula to solve for :
If the max height is 1.1 feet, we use the following formula to solve for :