Question
Class Management I Help HW 6 Extension Begin Date: 10/3/2017 12.00:00 AM- Due Date: 10/112017 11:59 00 PM End Date: 10/11/2017 11:59:00 PM (17%) Problem 5: A 5 5-kg bowling ball moving at 8.8 ma's collides with a 0 75 kg bowling pun = 8go form the initial direction ofthe bowling ball, with a speed of 17.5 ms ahich is s atter ed at an angle of Assignment Status Click here for detailed view 50% Part (a) Calculate the direction, in degrees, of the final velocity of the bowling ball This angle should be measured in the same way that is. Grade Summary Problem Status Potential 100% sinO 7 8 9 cos0 cotan0 asin acos( atan acotanO sinhO cosh tanh cotanho 1 Partial 2 Completed Attempts remaining ell per anmempt) detailed v 3 Completed Degrees 0, Radans SubrmsatHat i gite Feedback: deduction per feedback Hints:-2-deduction per hint Hints remaining: a 50% Part (b) Calculate the magnitude ofthe final velocity, in meters per second, of the bowling ball. 848 onm
Explanation / Answer
by conservation of momentum
initial horizontal momentum = final horizontal momentum
5.5 * 8.8 = 0.75 * 17.5 * cos(85) + 5.5 * v * cos(theta) --------- (1)
initial vertical momentum = final vertical momentum
0 = 0.75 * 17.5 * sin(85) + 5.5 * v * sin(theta) --------------- (2)
on solving we'll get
theta = 164.5 degree
v = -8.915 m/s
magnitude of final velocity = 8.915 m/s