Question 1 Hint 1 Two cars approach an extremely icy four-way perpendicular intersection. Car A travels northward at 20 m/s and car B is traveling eastward. They collide and stick together, traveling at 90 north of east. What was the initial velocity of car B? You may assume that the cars have the same mass. UB m/s Submit Question0 Question 2 v {in = (0.30 mls)i \"2.: = (o.12 mls)'i Image Description Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass of 2.35 X 105 kg and a velocity of (0.30 m/s)??, and the second having a mass of 1 x 105 kg and a velocity of (0.12 m/s):'n". What is their final velocity? of = [1 mls Submit Question 0 Question 3 v This is a 10 inelastic collision (well, two of them). The objects are on a flat surface with no friction. A 100kg object moving to the right at speed 56 mls, and a 150 kg object is moving to the left at 15 mls. 1. What are the two objects' (now a single 250 kg object} speed after the collision? Round to the nearest whole number. 2. What direction is this object going? Left or right? 0 right 0 left Then, a second collision occurs. This time a 50 kg object, moving to the left at 80 metersfsecond, collides inelastically with the now 250kg object. 3. What is the new combined speed of the three objects? Please round to the nearest whole number. 4. What direction are the three objects (now a single 300 kg object) going? Left or right? O right O left -2.2 Submit Question 0 Question 4 v m2 =150 kg This is an inelastic collision problem. One 100kg object is flying to the right at 30 mfs. It is in space, so there is no gravity. The other object, 150 kg, is traveling diagonally (up and left) at a speed of 60 meters per second, at an angle of 20 degrees with respect to the horizontal. They collide inelastically. Round all answers to two significant figures! 1. What is the \"x\" component of their velocity after the collision? Remember that the sign matters! Negative is left, and positive is right. Also, round your answer to two significant figures. 2. What is the \"y\" component of their velocity after the collision? Remember that the sign matters! Negative is down, and positive is up. Again, round the answer to two significant figures. 3. What is the magnitude of the (diagonal) velocity of the two objects after the collision (use Pythagorean theorem)? 4. What angle, in degrees, not radians, does their velocity make with the horizontal axis (to be specific, the -x axis, not the +x axis)? Submit Question 0 Question 5 v Hint 1 A 1830-kg railway freight car coasts at 4.4 m/s underneath a grain terminal, which dumps grain directly down into the freight car. If the speed of the loaded freight car must not go below 3.8 m/s, what is the maximum mass of grain that it can accept? mgrain : ' ' kg Submit Question 0 Question 6 v Hint 1 A 100-g firecracker is launched vertically into the air and explodes into two pieces at the peak of its trajectory. If a ZO-g piece is projected horizontally to the left at 23 m/s, what is the speed and direction of the other piece? You are responsible for the numeric result and the direction. =i imi Submit Question 0 Question 7 v Hint 1 Hint 2 A billiard ball, labeled 1, moving horizontally strikes another billiard ball, labeled 2, at rest. Before impact, ball 1 was moving at a speed of 3.8 m/s, and after impact it is moving at 1.4 mfs at 50 from the original direction {above the horizontal). If the two balls have equal masses of 300 g, what is the velocity of the ball 2 after impact? Express the velocity as a magnitude and an angle below the horizontal. of : mfs at below the horizontal Submit Question Question 8 What is the average momentum of a 74-kg sprinter who runs the 100-m dash in 10.2 s? p = kg m/s Submit