Asked by Anonymous

A train engine pulls out of a station along a straight horizontal track with five identical freight cars behind it, each of which weighs 88.0 kN. The train reaches a speed of 13.0 m/s within 6.50 min of starting out. Assuming the engine pulls with a constant force during this interval, and ignore air resistance and friction on the freight cars. Find the tension in the coupling between cars 2 and 3.
Give answer in kN please!!!
Answered by bobpursley
Three cars are being pulled (cars, 3,4,5)
tension= massthreecars*acceleration

so figure acceleration.

acceleartion= changevelocyt/time

change minutes to seconds in that.
Answered by Anonymous
isnt the velocity already 13.0 m/s for all of them and a=9.8 ??? bobpursley are you sure cuz your confusing me!!!
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