Physics

The spin-drier of a washing machine slows down uniformly from 700 rpm (revolutions per minute) to 140 rpm while making 50 revolutions. Find the angular acceleration through these 50 revolutions. Express your answer in rad/s^2.

asked by Anonymous
  1. (140-700) = -560 rev/min

    -560rev/min * 1min/60s * 6.28rad/rev =
    -58.6 rad/s. = The change in velocity.

    60s/560rev * 50rev = 5.36 s.

    a = (-58.6)/5.36 = -10.9 rad/s^2.



    posted by Henry

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    The spin-drier of a washing machine slows down uniformly from 880 rpm (revolutions per minute) to 260 rpm while making  50 revolutions.  Find the angular acceleration through these 50 revolutions.  Express your answer in
  2. physics

    2. On the spin cycle on a washing machine, the drum holding the clothes goes from zero to 180 rpm (revolutions per minute) in 8.0 seconds. (Hint: Be sure to change rpm to radians/sec.) (a) What is the angular acceleration (in
  3. Physics

    A certain CD has a playing time of 76 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude
  4. PHYSICS

    a wheel rotating at 1800 rpm slows down uniformly to 1200 rpm in 2.0 sec. calculate a)the angular acceleration (revs/s^2) of the motor. and b) the number of revolutions it makes in this time.
  5. Physics

    A certain CD has a playing time of 80 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude
  6. phy

    A certain CD has a playing time of 72 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude
  7. physivs

    A certain CD has a playing time of 68 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude
  8. Physics

    At t = 0 s a flywheel is rotating at 30 rpm. A motor gives it a constant acceleration of 0.9 rad/s^2 until it reaches 70 rpm. The motor is then disconnected. How many revolutions are completed at t = 20 s? number of revolutions?
  9. Physics

    Express the angular velocity of 36 rpm (revolutions per minute) in units of radians per second (rad/s).
  10. physics rotational acceleration - I am confused

    A gyroscope slows from an initial rate of 32.0 rad/s at a rate of 0.700 rad/seconds squared. How many revolutions does it make before stopping? If only I could find the angular velocity first, in radians/second... I'm assuming

More Similar Questions