Question

Constants Periodic significant figures than required for this part. A 250-kg beam 2.9 ini in length slides broadside down the ice with a speed of 23 in/s. A 60-kg man at rest grabs one end as it goes past and hangs on as both he and the beam go spinning down the ice. Assume frictionless motion. (Figure 1) Part B With what angular velocity does the system rotate about its cm? Express your answer using two significant figures. Figure 1 of 1 > VAX O2 ? w= 6.16 | rad/s Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining < Return to Assignment Provide Feedback

Answer 1

The location of centre of mass is, 2.9 2 = 1.45 m The position of centre of mass of system is, My, +m(0) Yem M+m (60)(1.45) 250+60 =0.2806 m =0.28 m The angular momentum before collision about centre of mass L = m cm = (250) (23)(0.28) = 1613.709677 kgm/s? = 1613.71 Kgm/s? 1x = 1cm+mr’o 1 = 3ml + M(L-y-) o = G(250)(29)* +(60)(0.28)° )+(60)(2.9–0.28 ) ) =262.046 @kgm/s = 262.00 kgm/s? From the conservation of angular momentum L2 = 1 591.776 @ = 1610 1613.709677 262.0446 @=6.158 rad/s =6.2 rads