A car with a mass of 1.1 × 103 kilograms hits a stationary truck with a mass of 2.3 × 103 kilograms from the rear end. The initial velocity of the car is +22.0 meters/second. After the collision the velocity of the car is -11.0 meters/second. What is the velocity of the truck after this elastic collision?

Question

anonymous · Answer

I just worked it out, my equation had been incorrect lol! thanks, you double checked my answer :)

anonymous · Answer

how do I give medals? I want to give you one lol

anonymous · Answer

apparently the collision is not completely elastic, conservation of linear momentum is the correct approch, sry for guiding you on the wrong track:

$$M_c*V_c=M_c*V_{c,new}+M_t*V_t$$

by substituiting with correct signs i get $$V_t = 15.7 m/s$$

XD now you can medal me clicking best response! XD ahahah