A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 34 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 120 m), the block swings toward the outside of the curve. Then the string makes an angle theta with the vertical. Find theta.
The Attempt at a Solution
All I could do was get the centripetal force, 34^2/120=9.63333N.
I have no idea where to go from here, and there are no similar problems I can find.
Thanks a million for any help.