PART a)
here when stone is dropped there is only gravitational force on it
so its acceleration is only due to gravity
so we will have

Part b)
Now from kinematics equation we will have

now we have
y = 25 m
so from above equation


Part c)
If we throw the rock horizontally by speed 20 m/s
then in this case there is no change in the vertical velocity
so it will take same time to reach the water surface as it took initially
So t = 2.26 s
Part D)
Initial speed = 20 m/s
angle of projection = 65 degree
now we have




PART E)
when stone will reach to maximum height then we know that its final speed in y direction becomes zero
so here we can use kinematics in Y direction



so it will take 1.85 s to reach the top
Answer:
0.8024
Explanation:
From the given question; we can say that the angular momentum of the system is conserved if the net torque is is zero.
So; 
At the closest distance ; the friction is :

According to Newton's Law:
F = ma
F = mrω²
From conservation of momentum:



However ; since the static friction is producing the centripetal force :


The coefficient of static friction between the bottoms of your feet and the surface of the turntable can now be calculated by using the formula :

= 
= ![[\frac{1200+(73(6)^2)}{((1200)+(73)(3)^2)} ]^2*[\frac{(\frac{\pi}{4})^2(3)} {9.8}]](https://tex.z-dn.net/?f=%5B%5Cfrac%7B1200%2B%2873%286%29%5E2%29%7D%7B%28%281200%29%2B%2873%29%283%29%5E2%29%7D%20%5D%5E2%2A%5B%5Cfrac%7B%28%5Cfrac%7B%5Cpi%7D%7B4%7D%29%5E2%283%29%7D%20%7B9.8%7D%5D)
= 0.8024
The acceleration of one of those bugs is equal to 305mi/s.
<h3>Acceleration calculation</h3>
To calculate the insect's acceleration, the action and reaction force of the impact must be considered.
As the insect will hit the helmet, the force it hits is the same force it receives, so we can make the following expression:


<em>Speed has been converted to miles per second</em>

So, the acceleration of one of those bugs is equal to 305mi/s.
Learn more about acceleration calculation: brainly.com/question/390784
Answer:
has more energy, has a greater amplitude, has a higher frequency
Explanation:
Answer:
The carbon atom has greater kinetic energy than a hydrogen atom.
Hope this helps! :)