A block is hung by a string from the inside roof of a van Wh

A block is hung by a string from the inside roof of a van. When thevan goes straight ahead at a speed of 31 m/s, the block hangs vertically down. But whenthe van maintains this same speed around an unbanked curve (radius= 165 m), the block swings toward theoutside of the curve. Then the string makes an angle with the vertical. Find .
= 1°