Question 19 A train wagon with speed v and mass m collides head-on and attaches to two conjoined wagons initially at rest on the railway to Busan. How much mechanical energy is lost in the process? O2m^2 O 3mv^2 none among the choices Omv^2/2 Omv^2/3 2 p
Question 3 A vector has an x-component A, >0 and has an angle & with respect to the +x-axis. Which of the following is a proper expression for the y component of the vector? O A, sec OA, tan O None of the given choices OA, cos O A, sin Previous Next 2 pts
Question 19 A train wagon with speed v and mass m collides head-on and attaches to two conjoined wagons initially at res
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