Answer:

Explanation:
Given
 -- initial velocity
 -- initial velocity
 --- height
 --- height
Required
Determine the time to hit the ground
This will be solved using the following motion equation.

Where

So, we have:


Subtract 30.2 from both sides





Solve using quadratic formula:

Where




Split the expression
 or
 or 
 or
 or 
Time can't be negative;  So, we have:


Hence, the time to hit the ground is 1.82 seconds
 
        
             
        
        
        
I have absolutely no clue
        
             
        
        
        
Explanation:
If we assume negligible air resistance and heat loss, we can assume that all of the Gravitational potential energy of the ball will turn into Kinetic energy as it falls toward the ground.
Therefore our Kinetic energy = mgh = (10kg)(9.81N/kg)(100m) = 9,810J.
 
        
             
        
        
        
To solve this task we have to make a proportion, but firstly we have to set up all the main points : so, the distance is  s=r(B), that has its <span>r=radius,B=angle in rad
velocity v=ds/dt= w(r)
Do not forget about </span> w = angular speed in rad/s and 

Now we can go to proportion




SOLVING FOR A : 



 or something about <span>10 mph --- SOLVING FOR B.
</span>I'm sure it helps!
 
        
        
        
if you are going slow, there wont be much of an effect or not any damage.