Question

PHY 221-Test 4 Problems: Show your work (diagrams, equations, mathematical manipulations, numerical substitutions, etc.) for all problems to receive credit (no work- no credit). Place a box around your final answer. Include units with all mumerical answers and record answers with the appropriate number of significant figures. All units must be in standard SI units. Include friction and/or air resistance only where indicated. 15) A grindstone has a moment of inertia of 1.6 x 103 kg-m2. When a constant torque is applied, the flywheel reaches an angular velocity of 1200 rev/min in 15 seconds. Assuming it started from rest, find (5 points) the angular acceleration a. (5 points) the unbalanced torque applied. b. c. (5 points) the angle turned in the 15 seconds.

Answer 1

We will first find angular acceleration and hen we will go for torque and angle rotated.

-evfmin edfe 007|1 125.66 ime t = ngules acce le sation - d& = (5 &3& angular fad acceleraton Torqua Irier tia aseloration share memerf 3 gular an 8.38 d&-3& -34 X-10 a-N (cAn g E = d: 83E 942.48 Yadian