I really need help with all of these questions please. These questions are also my last attempts. No need for long work shown. And I want to thank you very much in advance!

QUESTION 1 5 points Save Answer We start with some review problems A crate of mass 46.7 kg rests on a level surface, with a coefficient of kinetic friction 0.265. You push on the crate with an applied force of 294 N. What is the magnitude of the crate s acceleration as it 6.30 m/s^2 O 2.22 m/s^2 10.08 m/s^2 3.70 m/s^2 QUESTION 2 5 points Save Answer You place a crate of mass 34.6 kg on a frictionless 2.88-meter-long incline. You release the crate from rest, and it begins to slide down, eventually reaching the bottom 1.34 s after you released it. What is the angle of the incline? 23.9 degrees 19.1 degrees 28.7 degrees 40.2 degrees QUESTION 3 5 points Save Answer This time we have a crate of mass 24.0 kg on an inclined surface, with a coefficient of kinetic friction 0.130. Instead of pushing on the crate, you let it slide down due to gravity. What must the angle of the incline be, in order for the crate to slide with an acceleration of 7.77 m/s^2? 35.5 degrees 82.9 degrees 47.4 degrees 59.2 degrees QUESTION 4 5 points Save Answer A block of mass 1.05 kg is placed on a frictionless floor and initially pushed northward, whereupon it begins sliding with a constant speed of 5.01 m/s. It eventually collides with a second, stationary block, of mass 4.48 kg, head-on, and rebounds back to the south. The collision is 100% elastic. What will be the speeds of the 1.05-kg and 4.48-kg blocks, respectively, after this collision? 2.18 m/s and 2.81 m/s 3.11 m/s and 1.90 m/s 1.90 m/s and 3.11 m/s 1.70 m/s and 2.51 m/s Save All Answers Save and SubmitQUESTION 5 Spoints SaveAnswer Same situation as before. This time it s a block of mass 1.07 kg sliding with a constant velocity of 5.54 m/s to the north, which collides 100% elastically with a second, stationary block, of mass 3.40 kg, head-on, and rebounds back to the south, eventually colliding 100% elastically with a wall and rebounding northward. It then overtakes the second block, which is still moving north as a result of the first collision. What will be the speeds of the 1.07kg and 3.40kg blocks, respectively, after their SECOND collision with one another? ' 1.01 m/s and 1.32 m/s ' 2.53 m/s and 2.76 m/s " 3.49 m/s and 0.83 m/s 3.80 m/s and 1.80 m/s QUESTION 6 5points ' SeveAnswer Consider a non-rotating space station in the shape of a long thin uniform rod of mass 2.18 x 10A6 kg and length 1146 meters. Rocket motors on both ends of the rod are ignited, applying a constant force of F = 3.21 x 10A5 N to each end of the rod as shown in the diagram, causing the station to rotate about its center. If the motors are left running for 2 minutes and 34 seconds before shutting off, then how fast will the station be rotating when the engines stop? 3.63 rpm 5.81 rpm 2.27 rpm 0.91 rpm QUESTION 7 5 points Save Answer This time we have a non-rotating space station in the shape of a long thin uniform rod of mass 9.53 x 10A6 kg and length 710 meters. Small probes of mass 5220 kg are periodically launched in pairs from two points on the rod-shaped part of the station as shown, launching at a speed of 2041 m/s with respect to the launch points, which are each located 186 m from the center of the rod. After 18 pairs of probes have launched, how fast will the station be spinning? / 1.09 rpm " 1.70 rpm " 1.36 rpm ' 2.04 rpm QUESTION 8 Spoints saveAnswer Now we have a rod-shaped space station of length 1019 m and mass 8.89 x 10A6 kg, which can change its length (kind of like an old-fashioned telescope), without changing its overall mass. Suppose that the station is initially rotating at a constant rate of 1.26 rpm. If the length of the rod is reduced to 578 m, what will be the new rotation rate of the space station? if 6.27 rpm Save All Answers Save and Submit QUESTION 8 5poin|s SaveAnswer Now we have a rod-shaped space station of length 1019 m and mass 8.89 x 10A6 kg, which can change its length (kind of like an old-fashioned telescope), without changing its overall mass. Suppose that the station is initially rotating at a constant rate of 1.26 rpm. If the length of the rod is reduced to 578 m, what will be the new rotation rate of the space station? / ' 6.27 rpm " 1.88 rpm 3.92 rpm / ' 2.35 rpm QUESTION 9 5polnls SaveAnswer A diver of mass 61.9 kg stands on one end of a diving board of mass 21.2 kg, as shown in the diagram. Everything is in equilibrium (since nothing is moving). What is the magnitude of the support force on the opposite end of the diving board? 1,054 N 1,977 N 738 N 1,318 N QUESTION 10 5 points Save Answer You push on a rectangular door at the location of the knob (see diagram for top view). The door 5 mass is 69.0 kg, and its side-to-side width is 2.10 m. The knob is located 0.14 m from the right-hand side of the door. If you push with a force of 181 N, what will the be the door s angular acceleration as it swings on its hinges? (Note: the moment of inertia of the door of mass M and width x, swinging on its hinges, is (1/3) M xA2.) 2.80 rad/s/'2 / ' 4.90 rad/3A2 " 1.68 rad/5A2 3.50 rad/s/'2 Save All Answers Save and Submit QUESTION 1 Starting in Albany, you travel a distance 409 miles in a direction 11.5 degrees north of west. Then, from this new position, you travel another distance 199 miles in a direction 36.9 degrees north of east. In your final position, what is your displacement from Albany? 608 miles 48.4 degrees North of East 314 miles 39.8 degrees North of East 584 miles 57.8 degrees North of East / \\ 608 miles 48.4 degrees North of West 5 POMS Save Answer i QUESTION 2 You start out by driving 186 miles south in 2 hours and 10 minutes, and then you stop and park for a while. Finally you drive another 166 miles north in 2 hours and 55 minutes. The average velocity for your entire trip was 3.15 miles per hour to the south. How much time did you spend parked? 0 hours 38 minutes ' 6 hours 21 minutes " 1 hours 16 minutes ' 2 hours 32 minutes 5 points Save Answer i QUESTION 3 A rocket-powered sled moves along a track, eventually reaching a top speed of 287 We to the west. It then begins to slow down, reaching a complete stop after slowing down for 2.24 5. What was the sled 3 average acceleration and velocity during the slowdown phase? 0 m/s'\\2 0, 143.5 m/s west ' \\ 128.1 m/s/\\2 west, not enough information / ' 143.5 m/s"2 east, 143.5 m/s east ' 128.1 m/s'\\2 east, not enough information QUESTION 4 You have exactly 6 minutes 45 seconds to get to your next class on time and that classroom is 229 m east of where you are right now. First you run to your dorm room at an average velocity of 5.22 m/s to the south to pick up your calculator and your dorm room is 154 m south of where you were initially. What average velocity (magnitude only) do you now need to run from your dorm room to your classroom to arrive exactly on time? / \\ 0.95 m/s ' ' 0.68 m/s 5.22 m/s 0.73 m/s Save All Answers 5 points WI 5 Points Save Answer i Save and Submit QUESTION 5 5 points Save Answer A car drives around a circular track of diameter 176 m at a constant speed of 42.2 m/s. During the time it takes the car to travel 268 degrees around, what is the magnitude of the car s average acceleration? 0 m/sA2 20.24 m/s"2 10.12 m/s/'2 / \\ 6.22 m/sAZ QUESTION 6 5 points Save Answer You launch a projectile with an initial speed of 57.3 m/s from the top of a building 30.7 m above the ground, at an angle of 55.7 degrees above the horizontal. How far from the base of the building does the projectile land on the ground? 336.8 m A 317.1 m 327.0m / \\ 421.0m QUESTION 1 5 points Save Answer You launch a projectile at an initial speed of 42.4 m/s from the ground. After 4.50 seconds of flight, the projectile lands on the ground. At what angle above the horizontal was the projectile launched? 17.4 degrees ' \\ 26.7 degrees 31.4 degrees 53.4 degrees QUESTION 8 . Spoims SaveAnswer A projectile is fired from the ground, reaches a maximum height of 56.6 m and lands a distance of 72.3 m away from the launch point. What was the projectile 5 launch velocity? 63.0 m/s, 18.1 degrees above horizontal / \\ 35.0 m/s, 72.3 degrees above horizontal 33.3 m/s, 36.2 degrees above horizontal 10.6 m/s, 36.2 degrees above horizontal Save All Answers Save and Submit QUESTION 7 5 points Save Answer You launch a projectile at an initial speed of 42.4 m/s from the ground. After 4.50 seconds of flight, the projectile lands on the ground. At what angle above the horizontal was the projectile launched? ' ' 17.4 degrees ' 26.7 degrees 31.4 degrees ' 53.4 degrees Q U ESTI 0 N 8 5 points Save Answer A projectile is fired from the ground, reaches a maximum height of 56.6 m and lands a distance of 72.3 m away from the launch point. What was the projectile s launch velocity? 63.0 m/s, 18.1 degrees above horizontal " 35.0 m/s, 72.3 degrees above horizontal 33.3 m/s, 36.2 degrees above horizontal 10.6 m/s, 36.2 degrees above horizontal QUESTION 9 5 points Save Answer You launch a projectile toward a tall building. from a position on the ground 33.0 m away from the base of the building. The projectile 3 initial velocity is 53.6 m/s at an angle of 41.7 degrees above the horizontal. At what height above the ground does the projectile strike the building? 26.1 rn \" 75.7m 60.6m 18.0m QUESTION 10 5 points Save Answer You launch a projectile horizontally from a building 28.0 m above the ground at another building 39.9 m away from the rst building. The projectile strikes the second building 11.4 m above the ground. What was the projectile s launch speed? / ' 32.71 We " 21.69 m/s ' 16.70 rn/s ' 26.17 We Save All Answers Save and Submit