If the radius is 7.5 meters, then the circumference would be 47.1239. That times five is 235.6195
 
        
             
        
        
        
D because I learned this 2 years ago
        
             
        
        
        
Answer:
M1 V1 = M1 V2 + M2 V3    conservation of momentum
V2 = (M1 V1 - M2 V3) / M1      where V2 = speed of M1 after impact
V2 = (3 * 9 - 1.5 * 5) / 9  =   (27 - 7.5) / 9 = 2.17 m/s
Note: All speeds are in the same direction and have the same sign
 
        
             
        
        
        
Mass = 0.201kg
Energy = 15J
temperature change = 10C
Energy(E) = mass(m) × specific heat capacity(c) × temperature change(θ)
we can rearrange this to make specific heat capacity the subject
c =

c =

c =7.46268657
 
        
        
        
Answer:
19.6N
Explanation:
Given parameters: 
Mass of rock = 2kg 
Speed  = 30m/s 
Unknown: 
Net force on the rock  = ? 
Solution: 
The net force acting on this rock is a function of the acceleration due to gravity acting upon it. 
  Net force  = weight  = mass x acceleration due to gravity 
  Net force  = 2 x 9.8  = 19.6N downward