Home /
Expert Answers /
Mechanical Engineering /
block-a-of-mass-4-kg-is-moving-on-the-smooth-surface-to-the-right-at-7-m-s-when-it-squarely-strik-pa490
(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))