A train slows down as it rounds a sharp horizontal turn, going from 90 km/h to 54 km/h in the 15.0 it takes to round the bend. Compute the acceleration at the moment the train reaches 50.0 km/h. Assume the train continues to slow down at this time in the same rate.

Question

A train slows down as it rounds a sharp horizontal turn, going from 90 km/h to 54 km/h in the 15.0 it takes to round the bend.  Compute the acceleration at the moment the train reaches 50.0 km/h. Assume the train continues to slow down at this time in the same rate.

I need help finding the radius.

Thanks

bobpursley · Answer

I don't know for certain what round the bend means. If you knew it was a 90 degreebend, then you have the time (15sec) it takes to go 1/4 a circle, and the average speed, so you could compute the radius, however, round the bend to me doesn't imply a right turn.
I can't figure radius from what is given.