Questions
A rotating wheel changes angular speed from 1800 rpm to 3000 rpm in 20 s. What is the angular acceleration assuming to be uniform? [KCET 2014]
detailed solution
Correct option is C
We know that, ω=2πnGiven, n1=1800rpm,n2=3000rpm,Δt=20 s ω1=2πn1=2π×180060=2π×30=60πrad/sSimilarly, ω2=2πn2=2π×300060=2π×50=100πrad/sIf the angular velocity of a rotating wheel about an axis is changed by change in angular velocity in a time interval Δt, then the angular acceleration of rotating wheel about that axis is given byα= Change in angular velbcity Time interval =ω2-ω1Δt=100π-60π20=40π20=2πrads-2Similar Questions
A stationary wheel starts rotating about its own axis at uniform angular acceleration 8rad/s2. The time taken by it to complete 77 rotations is
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests