Part B - Thinking and Investigation ITI – 20 marks) 1. A child swings on a playground swing set. If the length of the swing is 3 m and the child wings through an angle of what is the exact arc length through which the child travel? 2. A bicycle tire revolves at 150 rpm (revolutions per minute). What is its anpalar velocity, in radiats per second rounded to two decimal places? 3. A 3-m ladder is leaning against a vertical wall such that the angle between the ground and the ladder in. What is the exact height that the ladder reaches up the wall? 4. Find the exact value of cos co- 5. Solve Osun'r-Scox-2 -0 on the interva! 2 € (0,2x] V