Exam 1

10. A sky diver drops his smuggled 1kg weight from physics lab out of the air plane before he jumps, which is flying horizontally going 175 m/s at a height of 2 km. IF WE ASSUME NO AIR RESISTANCE, what is the Velocity (magnitude and direction) when it hits the 3 AT hzL & grpund. I — 17§ /s J 5 2 9 V= 264,39 mj /f 2 g T K IHanio0g) sooom: 446 J | anls ) , \ 2198, : - o= 4%.¢" ( 2000m C\\ L e Je-doee SV Vyz 0+ 9.41(20.2) e ‘ \ £-7075 B — 4% 14 Vo 19% 19 wm fs Af i 2 “ - Bz te g7 1754 1ag.1a2- = U, 4° = 264 3q 11. If an object initially at rest is given a velocity of: vx =-1.93 m/s and vy =2.51 m/s./\Nhat is the magnitude and direction its displacement after a time of 3.50 seconds? 6/0%\ YEE = e a3 (35) Yz vyt 7 gresi () L= -6.75% 4= 9.75¢ o «.7%8 . WS i e = 4an ( ( 7ee > masmiuc\c L ,\“/s o = Ir (ll"{(4‘{oy")f @ 2.4 e — 150-s2.9=1717.5¢ 12. A cannon shell is fired on a flat surface and it is found that the shell is in the air for 2.78 s and reaches a distance of 94.7 m. What was the initial Launch angle and speed? /' \ E,LI\\'\" C\L;Nlé{};&wfi, \/:%, S\, 2 2785 (A8 of 7651500 . 2 s (e —y Han (- >4an < =)= B: 21 _— j——____G=tar <—;§> 7 ¢ — Z(%—;} 19 VAR i T—— - - | Louneh Angle L 25“\(?1‘3) ' = 1,27 Coizetk Vo C [ =7 ooy = 3609 R WS 13. In an airport moving walkways help get passengers to their gates faster. In one case a person stands on the walkway and arrives at the gate in 525 seconds. Another time the walkway is broken and he makes the same trip in 357 seconds walking at a constant speed. How fast could he make it, if he walked the same speed on the moving walkway? V= 4/ V, zd/5s7 | “+=—d/ (. d_ 4 T 2 _ 2. = TRy & d 5257 357 00087 21<. 5 ¢