Mechanics _ physics

posted by .

A wheel rotating with an angular velocity of 16rad/sec is slowed to an angular velocity of 4rad/sec by an angular acceleration of 2rad/sec^2.find
a. The angle turned in the process of slowing down
b. The time required

  • Mechanics _ physics -

    a. V^2 = Vo^2 + 2a*d.
    d = (V^2-Vo^2)/2a.
    d = (16-256)/-4 = 60 Rad.

    b. t = (V-Vo)/a = (4-16)/-2 = 6 s.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    1.(a)When a record player is stopped, the turnabble initially rotating at 33.3rpm,slows down and stops 60s.Calculate the angular acceleration of the turnable.(b)a grinding wheel when turned on,accelerates with an agnular acceleration …
  2. physics help ; )

    1.(a)A centrifuge accelerates from rest with an angular acceleration of 30rad/s^2.What is the angular velocity of the centrifuge after 30s?
  3. Physics Really Need Help Please

    At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad …
  4. physics

    a wheel starts from rest and rotates with a constant angular acceleration and reaches an angular speed of 12 rad/sec in 3 sec. find the angle through which it rotates in this time.
  5. science

    please help...A wheel 1.0m in diameter is rotating about a fixed axis with an initial angular velocity of 2rev.s-1.the angular acceleration is 3rev.s-1. (1)compute the angular velocity after 6s. (2)through what angle has the wheel …
  6. Physics

    A wheel turns through 90.0 revolutions in 15.0 sec. The angular speed at the end of this 15.0 sec period is 10.0 rev/s. Assuming that the angular acceleration is constant, calculate a) the angular speed at the beginning of the 15.0 …
  7. physics

    wheel is spinning with angular speed 8.6 radian/sec.small fractional force on shaft causes a constant angular deacceleration and wheel come to rest in 192 sec.what is angular acceleration and total angle turned during the slow down
  8. Physics

    1. A point on the edge of a large wheel of radius 0.45 meters moves through an angle of 170o at a constant angular velocity of 0.25 radians/sec. . (a) Find the length (in meters) of the arc described by the point. (b) Find the linear …
  9. phy

    A record player takes 4.5 sec to spin up to 45 RPM. What is the angular displacement and angular velocity when t=3 sec. I was only able to find angular acceleration from the information given. Which is 1.05 rad/sec^2
  10. Science

    A car is moving from rest .After 10 sec its wheel rotate 360 times in 1 minute. If the radius of the wheel is 50 cm, then find (1) angular acceleration and (2) angular velocity after 30 sec

More Similar Questions