Class l HW13( Linear momentum) Begin Date: 10/20/2017 12:00-00 AM-Due Date: 10/3
ID: 1791230 • Letter: C
Question
Class l HW13( Linear momentum) Begin Date: 10/20/2017 12:00-00 AM-Due Date: 10/30/2017 11:59:00 PM End Date: 12/14/2017 12:00:00 AM (1096) Problem 10: A baseball of mass m,-0.28 kg is thrown at another ball hanging from the ceiling by a length of string L-1.65m. The second ball m-0.79 kg is initially at rest while the baseball has an initial horizontal velocity of V-3 m's. After the collision the first baseball falls straight down (no horizontal velocity.) Randomized Variables - 0.28 kg m;=0.79kg L= 1.65 m V3.5 m's Otheexpertta.co 50% Part (a) Select an expression for the magnitude of the closest distance from the ceiling the second ball will reach d Grade Summary Potential100 Submissions Attempts remaining 33% per attempt) 02 7m 2m 2g detailed view Submit Hant I give upt Hints:t deduction per hint Hants remaining Feedback: 0% deduction per feedback. 50% Part (b) what is the angle that the string makes with the vertical at the highest point of travel in degrees? All conten°2017Expert TA LLCExplanation / Answer
a) d = L - [ (m1 v1)2 / 2 m22 g ]
b) theta = cos-1 [1.65 - h / 1.65]
v2 = m1 v1 / m2 = (0.28 * 3.5) / (0.79) = 1.24 m/s
h = 0. 5 v22 / g = 0.5 * 1.242 / 9.8 = 0.078 m
theta = cos-1 [1.65 - 0.078 / 1.65]
theta = 17.7 deg