Answer:
wA - T =mA(a) 
second option
Explanation:
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Answer:
  KE = 1.75 J
Explanation:
given,
mass of ball, m₁ = 300 g = 0.3 Kg
mass of ball 2, m₂ = 600 g = 0.6 Kg
length of the rod = 40 cm = 0.4 m
Angular speed = 100 rpm= 
                          =10.47\ rad/s
now, finding the position of center of mass of the system
     r₁ + r₂ = 0.4 m.....(1)
  equating momentum about center of mass
   m₁r₁ = m₂ r₂
    0.3 x r₁ = 0.6 r₂
    r₁ = 2 r₂
Putting value in equation 1
 2 r₂ + r₂ = 0.4
  r₂ = 0.4/3
  r₁ = 0.8/3
now, calculation of rotational energy




  KE = 1.75 J
the rotational kinetic energy is equal to 1.75 J
 
        
             
        
        
        
It's a combination of all those things. probably because we are taught from an early age to write in an academic fashion, giving balanced arguments and a conclusion. When speaking from the heart, there is no opposing argument nor is there a conclusion, just emotion.
        
             
        
        
        
Answer:
the work done by friction on the car is 524,582 J.
Explanation:
Given;
mass of the roller coaster, m = 800 kg
distance moved by the coaster, d = 225 ft = 68.58 m
final velocity of the coaster, v = 80 mi/h = 35.76 m/s
The time taken for the coaster to drop down the hill is calculated as;

The work done by friction on the car is calculated as;
 
Therefore, the work done by friction on the car is 524,582 J.
 
        
             
        
        
        
Answer:
Ultraviolet 
Explanation:
The electromagnetic spectrum is divided into a number of parts. One of which is the ultraviolet region. The ultraviolet region is found between the 100 nm - 400 nm band of the electromagnetic spectrum. From the range we just stated now, we can see for certainty that the given range 210 nm - 230 nm lies inside of the 100 nm c 400 nm of the electromagnetic spectrum, that of which is the ultraviolet region.