Saved Bookmarks
| 1. |
A disc of radius 10cm is rotating about its axis at ana angular speed of 20rad/sec .Find the linear speed of(a) a point on the rim,(b) the middle point of a radius. |
|
Answer» Given in the question Angular speed, ω = 20 rad/s r = 10 cm = 0.10 m Now for condition (a) Here, The linear speed at rim = ωr =ωr = 20 x 0.10 = 2 m/s Now for condition(b) At radius middle point r' = 0.10/ 2 r' = 0.05 m Hence The linear speed at middle point radius = ωr' = 20 x 0.05 = 1 m/s . |
|