Two air cars collide on a frictionless air track. The mass ofcar 1 is 0.600 kg a
ID: 1756195 • Letter: T
Question
Two air cars collide on a frictionless air track. The mass ofcar 1 is 0.600 kg and its velocity is .40 m/s to the right whilecar 2 has a mass of .500 kg and a velocity of .65 m/s to the leftbefore they collide. After the collision the first car rebounds tothe left with a velocity of .250 m/sec. NOTE: Velocities to theright are + and those to the left are -. A. Calculate the KE before the collision and the KE after thecollision. Are the kinetic energies before and after equal? Two air cars collide on a frictionless air track. The mass ofcar 1 is 0.600 kg and its velocity is .40 m/s to the right whilecar 2 has a mass of .500 kg and a velocity of .65 m/s to the leftbefore they collide. After the collision the first car rebounds tothe left with a velocity of .250 m/sec. NOTE: Velocities to theright are + and those to the left are -. A. Calculate the KE before the collision and the KE after thecollision. Are the kinetic energies before and after equal?Explanation / Answer
Given :
m1 = 0.600 kg
u1 = 0.40 m /s
v1 = - 0.250 m /s
m2 = 0.500 kg
u2 = - 0.65 m /s
Velocity of second car after collision is :
v2 = [ u2 ( m2 - m1) + 2 m1 u1 ] /(m1 + m2)