<span>1.0 m/s
Momentum = mass x velocity
Total Momentum before any collision = total momentum afterwards
4.0 x 3.0= 12 :g x momentum before (x g because using weight)
Afterwards, if the velocity of the two joined is v then we get:
'momentum x g'=12v
so 12v=12
so v=1m/s</span>
        
             
        
        
        
Answer:
it's important because it shows how thermal energy transforms or continues to be all around us in everything 
  
        
             
        
        
        
Answer:
750 J
Explanation:
lets convert mass into kg first , 150 /1000 = 0.15 kg
kinetic energy =   =
 =  
 
        
             
        
        
        
Answer:
128.9 N
Explanation:
The force exerted on the golf ball is equal to the rate of change of momentum of the ball, so we can write:

where
F is the force
 is the change in momentum
 is the change in momentum
 is the time interval
 is the time interval
The change in momentum can be written as

where
m = 0.04593 kg is the mass of the ball
u = 0 is the initial velocity of the ball
 is the final velocity of the ball
 is the final velocity of the ball
Substituting into the original equation, we find the force exerted on the golf ball:

 
        
             
        
        
        
That's called the wave's "wavelength" .