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Homework Statement
There's a car, there's a cannon strapped on top of a car, the car travels with a velocity of 20 m/s and the cannon fires. The cannon fires a ball at 200 m/s. What is the velocity of the car? Velocities are with respect to the ground.
mass car = 1000
mass cannon = 100
Homework Equations
SUMATION p_initial = SUMMATION p_final
The Attempt at a Solution
100*20 + 1000*20 = 100*(-200+20) + 1000*V_car
22000 = 100* (-180) + 1000*V_car
40000 = 1000* V_car
V_car = 40 m/s