Thursday

April 17, 2014

April 17, 2014

Posted by **andrew** on Monday, October 4, 2010 at 5:29pm.

The answer I got was 0.5 but was incorrect so can someone show me how to do this problem.

- Physics -
**bobpursley**, Monday, October 4, 2010 at 5:33pmI like moving things to radians, not revs.

angularaccleration=changevleociyt/time

= -3*2PI/1 rad/sec

finalangulvelocity^2=intialangularvelocity^2+2*angularacceleration*displacement

0=(3*2PI)^2+2(-2*3PI)*displacment

solve for displacement (in radians) ; divide by 2PI to get revs.

- Physics -
**andrew**, Monday, October 4, 2010 at 5:35pmOk thanks.

- Physics -
**Mak**, Saturday, October 27, 2012 at 1:49pm1.5 revolutions.

If it starts at 3 rev/sec and ends at 0 rev/sec and decelerates uniformly, then the avg is 1.5 rev/sec. It spent 1 second, so 1.5 rev/sec * 1 sec = 1.5 rev

**Related Questions**

Physics - A bicycle wheel of radius 0.30 m is spinning at a rate of 60 ...

Physics - A CD rotates at 500 (revolutions per minute) while the last song is ...

Math - A bicycle wheel is 30 inches in diameter. a. to the nearest revolution, ...

physics - A bicycle wheel of radius 0.4 m is spinning at a rate of 40 ...

Physics - The wheel of a car has a radius of 0.288m and is being rotated at 830 ...

trig - How fast is a bicycle traveling in feet per second if a wheel has a 21-in...

Physics - A bicycle wheel of radius .7m is rolling without slipping on a ...

Physics - A bicycle wheel of radius .7m is rolling without slipping on a ...

Physics - A bicycle wheel of radius .7m is rolling without slipping on a ...

Physics - A bicycle wheel of radius .7m is rolling without slipping on a ...