일반물리학 1 — Potential Energy and Conservation of Energy: Problem 12

12 (a) In Problem 8, using energy techniques rather than the techniques of Chapter 4, find the speed of the snowball as it reaches the ground below the cliff. What is that speed (b) if the launch angle is changed to 41.0° below the horizontal and (c) if the mass is changed to 3.00 kg? [Reference Data from Problem 8: Mass $m = 1.50\text{ kg}$, cliff height $h = 11.5\text{ m}$, initial speed $v_i = 16.0\text{ m/s}$, initial angle $\theta = 41.0^\circ$ above the horizontal.]