Question

19) A man fall off a bridge and hits the water below. Ignoring air friction, what is his maximum height that he has fallen, if it takes 11 sec to hit the water below? Use g = 32.2"/ (a) 177.100 feet 593.505 feet 828.945 feet (d) 1948.10 feet seca. 20) Problem 9500 A bicyclist initially travels from points A -o- B at an average speed of 20 Miles/Hr. Then, he immediately turns around and returns at an average speed of 10 Miles/Hr. The entire trip takes one hour. (a) What is the distance from point A -to-B? (b) What is the displacement for the entire round trip? Total Time = 1 Hour Avg Speed= 20 Miles/Hr A . Avg Speed = 10 Miles/Hr Figure 1-1 Part A (c) (d) 0.667 Miles 6.670 Miles 0.3670 Miles 3.670 Miles 5

Answer 1

10) brridge. 1998.10 feet. Initial velocity of the man is us onts, o ff/see. Time taken to hit the water is t = 1l see. Now, g = 32.2 ft/see. So, H= ut t I get - - H= of 1 x 32.2x (11)2 = . H= 1948.10 ft (as 20). Average speed from A to B, 0,= 20 miles/hes, Average speed Room Blod- I = 10 miles/ks. If, distance of a to B is s miles, to go from A to Ba "=20 miles/h. & 's = 10 miles/h . then time taken And, time taken to reach A from B -

Now, for the trip is - total time t=dit de = taken 1 ks. S & s [ font de J-1. stato, 1 uq 20x10 to 20+10 . & s= 30 200 = 6.67 miles 6.67 miles. (b) i s =