A penny is placed on turntable at a radius of 12 cm. The turn table rotates with a period of 1.8 seconds. What is the acceleration? I got 1.77, but the answer was 1.74. What should I have done to get that answer?
2007-04-16 17:02:56 · 3 answers · asked by melanie s 2 in Science & Mathematics ➔ Physics
velocity is .4 m/s. we want to use the standard units. First I divided the velocity by the radius to get the mass. than I times the mass by the velocity squared and divided it by the radius. but the answer still wasn't right
2007-04-16 17:37:23 · update #1
Let me see :
Period = 2pi / w
w = angular velocity
period = 1,8 seconds, then :
1,8 = 2pi / w
w = 3.49 rad / s
And we know, linear velocity is = w*radius
V = 3.49*12/100 = 0.4188 m/s
acceleration must be the centripetal acceleration :
Ac = (0.4188)^2 / 12/100 = 1.46 m/s^2
2007-04-16 17:44:16 · answer #1 · answered by anakin_louix 6 · 0⤊ 0⤋
If the lines of stress meets at a factor from all radial instructions then this is a source of proper stress.eg stress of gravitation,or Electrostatic.There would be a centripetal and centrifugal stress.
2016-11-25 00:11:53 · answer #2 · answered by duitch 4 · 0⤊ 0⤋
what are your units?
2007-04-16 17:23:22 · answer #3 · answered by gatorbait 7 · 0⤊ 0⤋