A car of mass m traveling at speed v crashesinto the rear of a truck of mass 2 m

Question

A car of mass m traveling at speed v crashesinto the rear of a truck of mass 2m that is at rest and inneutral at an intersection. If the collision is perfectlyinelastic, what is the speed of the combined car and truck afterthe collision?

v/3
2v
none ofthese
v/2
v
A car of mass m traveling at speed v crashesinto the rear of a truck of mass 2m that is at rest and inneutral at an intersection. If the collision is perfectlyinelastic, what is the speed of the combined car and truck afterthe collision?

v/3
2v
none ofthese
v/2
v
v/3
2v
none ofthese
v/2
v

Explanation / Answer

Hi, From conservation of momentum mv = (m+2m)V Then the velocity after collision is V = v/3 Hope this helps you.

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