LECTURE NOTES IN ENGINEERING MECHANICS b. 67.38 m/s d. 87.38 m/s 24. What maximum height was attained by the ball? a. 167.72 m c. 187.72 m b. 177.72 m d. 197.72 m 25. What is the direction of the ball's velocity just before it strikes the given point? a. 31.99 from the positive x-axis b. 33.990 from the positive x-axis C. 35.99 from the positive x-axis . 37.99 from the positive x-axis PROBLEM 3.18 26. Wanting to invite Claudine to his party, Dovann is throwing pebbles at her window with a launch angle of 55 from the horizontal. He is launching the pebble 8 m below her window and 10 m from the base of the wall. What is the initial speed of the pebbles? a. 7.98 m/s c. 5.98 m/s b. 6.98 m/s d. 15.41 m/s PROBLEM 3.19 27. Dovann practices shooting three-pointers from a distance of 7.50 m from the hoop, releasing the ball at a height of 2.00 m above the floor. A standard basketball hoop's rim top is 3.05 m above the floor. He shoots the ball at an angle of 45 with the horizontal. At what initial speed must he shoot to make the basket? a. 8.98 m/s c. 9.98 m/s b. 7.25 m/s d. 9.25 m/s PROBLEM 3.20 28. A cannon is fired from a hill 120 m high at an angle of 25 with respect to the horizontal. If the muzzle velocity is 36 m/s, what is the speed of a 4kg cannonball when it hits the ground 120 m below? a. 117.15 m/s c. 127.15 m/s b. 107.15 m/s d. 137.15 m/s 33 LECTURE NOTES IN ENGINEERING MECHANICSInstruction: Do as required. Present in writing the full details of your answer or solutions. The grades you earn for each item will be based on correctness, completeness and clarity of presentation