Posted by Dani on Tuesday, May 3, 2011 at 4:53pm.
An electric motor rotating a workshop grinding wheel at a rate of 95 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.40 rad/s2.
(a) How long does it take for the grinding wheel to stop?
(b) Through how many radians has the wheel turned during the interval found in (a)?

Physics  Henry, Wednesday, May 4, 2011 at 9:59pm
a. V=95rad/min * 6.28rad/rev * (1/60)min/s = 9.94rad/s.
Vf = Vo  at = 0,
9.94  2.4t = 0,
2.4t =  9.94,
t = 4.14s.

Physics  Henry, Wednesday, May 4, 2011 at 10:05pm
b. d=9.94rad/s * 4.14s = 41.2 radians.

Physics  Taylor, Monday, October 17, 2011 at 8:37pm
For part B you have to divide the 9.94 by 2 then multiply by time
Answer This Question
Related Questions
 Physic  An electric motor rotating a workshop grinding wheel at a rate of 114 ...
 physics  An electric motor rotating a workshop grinding wheel at a rate of 9.80...
 GENERAL PHYSICS  An electric motor rotating a grinding wheel at 100 rev/min is ...
 Physics  An electric motor rotating a workshop grind ing wheel at a rate of ...
 Physics  an electric motor accelerates a grinding wheel at constant ...
 Physics  A point on the rim of a 0.75 m diameter grinding wheel changes speed ...
 Physics  At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It...
 physics  3 An electric motor can accelerate a Ferris wheel of moment of ...
 Physics  The flywheel of a steam engine runs with a constant angular speed of ...
 phy  A grinding wheel 0.62 m in diameter rotates at 2400 rpm. (a) Calculate its...
More Related Questions