Lecture 2 Relative Motion You are swimming across a 50m wide river in which the current moves at 1 m/s with respect to the shore. Your swimming speed is 2 m/s with respect to the water You swim across in such a way that your path is a straight perpendicular line across the river How many seconds does it take you to get across? a)50/2=25s b)50/1=50s c)50/3=29s m 1m/s d)50/√2=35s Physics 121: Lecture 7, Pg 8Physics 121: Lecture 7, Pg 8 Lecture 7, ACT 2 Relative Motion You are swimming across a 50m wide river in which the current moves at 1 m/s with respect to the shore. Your swimming speed is 2 m/s with respect to the water. You swim across in such a way that your path is a straight perpendicular line across the river. How many seconds does it take you to get across? 2m/s 50m 1m/s a) 50 2 = 25s b) 50 1= 50s c) 50 3 = 29s d) 50 2 = 35s