Question
An electric motor rotating a workshop grind- ing wheel at a rate of 147 rev/min is switched off with a constant deceleration of 1.24 rad/s2.
How long does it take for the grinding wheel to stop?
Answer in units of s
Through how many radians has the wheel turned during the deceleration?
Answer in units of rad
How long does it take for the grinding wheel to stop?
Answer in units of s
Through how many radians has the wheel turned during the deceleration?
Answer in units of rad
Answers
bobpursley
change rev/min to rev/second
then, wf=wi+at where a=-1.24r/s^2
solve for t.
Dfinal(in radians)=wi*t+1/2 a t^2
then, wf=wi+at where a=-1.24r/s^2
solve for t.
Dfinal(in radians)=wi*t+1/2 a t^2