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(Solved): Block A of mass 4 kg is moving on the smooth surface to the right at 7(m)/(s) when it squarely strik ...



Block A of mass 4 kg is moving on the smooth surface to the right at

7(m)/(s)

when it squarely strikes block

B

, which is at rest and has a mass of 7 kg . If the coefficient of restitution is 0.4 , determine the velocity of block A. Enter in

x.\times (m)/(s)

format Note: The coefficient of restitution is a measure of energy loss during an impact. This energy goes into the generation of sound, light, heat, and permanent deformation. The equation is on the course equation sheet:

e=(v_(B_(2))-v_(A_(2)))/(v_(A_(1))-v_(B_(1)))

Since the system only has an equal and opposite reaction force between the two masses, there is a net 0 impulse and therefore a net 0 change in linear momentum:

m_(A)v_(A_(1)) m_(B)v_(B_(1))=m_(A)v_(A_(2)) m_(B)v_(B_(2))


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