A car of mass m moving at a speed V collides with a stationary car of mass 2m. What is the momentum of both cars after coupling?
| December 2, 2020 | education
Given:
mv1 = m
mv2 = 2m
vv1 = v
vv2 = 0
To find: p =?
Decision
Let us write down the impulse formula
p = mv
Impulse of the first car before collision:
pv1 = mv
Impulse of the second car before collision:
pv2 = 2mv = 0
Impulse of both cars after coupling:
p = (m + 2m) v = 3mv
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