Rate of speed (3 m/s north is three miles per second north, so it's a rate of speed)
        
                    
             
        
        
        
Answer:
Normal stress = 66/62.84 = 1.05kips/in²
shearing stress  = T/2 = 0.952/2 = 0.476 kips/in²
Explanation:
A steel pipe of 12-in. outer diameter  d₂ =12in  d₁= 12 -4in = 8in
4 -in.-thick  
angle of 25° 
Axial force P = 66 kip axial force
determine the normal and shearing stresses 
Normal stress б = force/area = P/A
            = 66/ (П* (d₂²-d₁²)/4 
            =66/ (3.142* (12²-8²)/4
           = 66/62.84 = 1.05kips/in²
Tangential stress T = force* cos ∅/area = P/A
            = 66* cos 25/ (П* (d₂²-d₁²)/4 
            =59.82/ (3.142* (12²-8²)/4
           = 59.82/62.84 = 0.952kips/in²
shearing stress  = tangential stress /2
                            = T/2 = 0.952/2 = 0.476 kips/in²
 
        
             
        
        
        
To solve this exercise, it is necessary to apply the concepts of conservation of the moment especially in objects that experience an inelastic colposition.
They are expressed as,

Where,
 = mass of the skier
= mass of the skier
 = mass of the cat
= mass of the cat
 = initial velocity of skier
 = initial velocity of skier
 = initial velocity of cat
 = initial velocity of cat
 = final velocity of both
= final velocity of both
Re-arrange to find V_f we have,



Once the final velocity is found it is possible to calculate the change in kinetic energy, so




Therefore the amount of kinetic energy converted in to internal energy is 819J