Answer:
a) KE = 888.26J
b) N = 294.5 turns
Explanation:
For the kinetic energy:

The inertia is:

So, the kinetic energy will be:

Now, friction force is:
Ff = μ*N = 0.80*5N = 4N
The energy balance would be:
Kf - Ko = Wf    where Kf=0;   Ko = 888.26J;  and Wf is the work done by friction force.
Wf = -Ff*d = -Ff*N*2*π*R   where N is the amount of turns it gives.
Replacing these values into the energy balance:
0-888.26=-4*N*2*π*0.12
-888.26=-0.96*π*N
N=294.5 turns
 
        
             
        
        
        
Answer:
mass is lifted 1.8 m. What is the potential energy of the mass 4. A 100 kg
 
        
                    
             
        
        
        
Answer:
The mass m is 0.332 kg or 332 gm
Explanation:
Given
The platform is rotating with angular speed , 
Mass m is moving on platform in a circle with radius , 
Force sensor reading to which spring is attached , 
Now for the mass m to move in circle the required centripetal force is given by 
=>

Thus the mass m is 0.332 kg or 332 gm
 
        
             
        
        
        
please give me brainlest!!
the answer is A.
 
        
             
        
        
        
The letter that answers this question correctly is E .