1 At An Intersection Car A Was Traveling South And Car B Was Traveling 35 North Of East When They Slammed Into Each Ot 1 (58.15 KiB) Viewed 41 times
1 At An Intersection Car A Was Traveling South And Car B Was Traveling 35 North Of East When They Slammed Into Each Ot 2 (54.67 KiB) Viewed 41 times
1. At an intersection car A was traveling south and car B was traveling 35° north of east when they slammed into each other. Upon investigation it was found that after the crash the two cars got stuck and skidded off at an angle of 15° north of east. Each driver claimed that he was going at the speed limit of 60 km/h and that he tried to slow down but couldn't avoid the crash because the other driver was going a lot faster. Knowing that the masses of cars A and B were 1000 kg and 1200 kg, respectively, determine (a) which car was going faster, (b) the speed of the faster of the two cars if the slower car was traveling at the speed limit N 15° A B 1350 or . (Hint) Obtain Principle of impulse and momentum along the x-axis (Eq. 1), and along the y-direction (Eq. 2). Then divide (Eq. 2) by (Eq. 1) to find ve/v1 or /ve.
2. You are simulating a lunar lander with 600-kg mass is descending onto the moon's surface with a velocity of 3 m/s when its retro-engine is fired. If the engine produces a thrust T for 5 s which varies with the time as shown and then cuts off, calculate the velocity of the lander when t = 6 s, assuming that it has not yet landed. Use g = 1.60 m/s as the gravitational acceleration at the moon's surface. 3 m/s T(N) 600 kg 1 800 T 0 3 5115) (Hint) You need to include impulses due to its self-weigh (for 6 s), and the thrust (for 3 s + 2 s)
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