2 points Save Answer In each case below, an arrow has been shot from the top of a building either up at a 45 angle, straight out horizontally, or down at a 45 angle. All arrows are identical and are shot at the same speed, and the heights of the buildings and the direction the arrows are shot are given. Ignore air resistance. A B 45 45 C D 45 E 45 50 m 30 m 50 m 30 m 40 m Rank the speed of the arrows just before they hit the ground below (greatest to least). Explain your reasoning. QUESTION 2 2 points Save Answe In each case below, a toboggan starts from rest and slides without friction down a snowy hill. The toboggans are all identical, and the starting heights (vertical distance above the flat bottom of the incline) and angles of the hills are given. A B 15 m 15 m 28 22 0 22 D 12 m 10 m 18 Rank the speed of the toboggans at the bottom of the incline (greatest to least). Explain your reasoning. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). QUESTION 3 2 points Save Answer For extra excitement, a new roller coaster ride is designed to launch the riders over an alligator-infested lagoon. The frictionless coaster starts at rest at point A. The coaster lands on a ramp on the other side of the lagoon. A After it is airborne, will the maximum height of the coaster be (i) greater than, (ii) less than, or (iii) equal to the height at point A? Explain your reasoning. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial x >11 < 10pt ABC T " A I H * + ++ QUESTION 4 Shown are blocks that slide down frictionless inclines. All masses start from rest at the top of the incline. A 1 m 10 kg C 1 m 10 kg 5 m E 5 kg 0.5 m B 2 m 1 kg -10 m- D 1 kg 0.5 m -10 m- -5 m- F LL 15 kg 0.75 m Rank the kinetic energy of the sliding masses the instant they reach the bottom of the incline (greatest to least). Explain your reasoning. -5 m- -7.5 m- 2 points Save