Purchase Solution

Calculating Angular Acceleration and Revolutions

Not what you're looking for?

Ask Custom Question

Question: The blades of a fan running at low speed turn at 250 rpm. When the fan is switched to high speed, the rotation rate increases uniformly to 350 rpm in 5.75 s.
a.) What is the magnitude of the angular acceleration of the blades?
b.) How many revolutions do the blades go through while the fan is accelerating?

Purchase this Solution
Solution Summary

The following solution provides a detailed step-by-step explanation of how to solve both of these physics-based questions, which pertain to acceleration. The equations and variables which are needed to solve for these problems are included.

Solution Preview

a) Initial angular speed of the fan is Ai = 250 rpm, we will convert this to radians/sec for easy calculation.
- 250 rotations/min =250 * 2 * pi rotations/60 seconds
Ai = 500 pi/60 rad/sec = 8.33 pi rad/sec

Similarly, Af = 350 * 2 * pi/60 = 11.67 pi ...

Purchase this Solution
Free BrainMass Quizzes
Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

Basic Physics

This quiz will test your knowledge about basic Physics.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

The Moon

Test your knowledge of moon phases and movement.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

View More Free Quizzes
Related BrainMass Solutions

  • Calculating angular speed and revolutions

    27547 Calculating angular speed and revolutions An electric ceiling fan is rotating about a fixed axis with an initial angular velocity of 0.200 rev/s . The angular acceleration is 0.911 rev/s^2 . Its blades form a circle of diameter 0.720m .

  • Angular acceleration

    Determine (a) angular acceleration of the pulley (b) number of revolutions it makes during this time (c) Torque acting on the pulley. (d) Mass of the pulley.

  • Acceleration, angular speed and revolutions

    76534 Acceleration, angular speed and revolutions The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 5.0 rev/s in 8.0 sec. a) What is the average acceleration in radians/sec?

  • Physics - Mechanics - Circular Motion

    Assume constant angular acceleration while it is starting and stopping. For the start, w1 = 0, w2 = 5 rev/s x 2(pi) radians/rev = 10(pi) = 31.41 rad/s. Angular acceleration, alpha = (w2 ?w1)/t = 31.41/8 = 3.93 rad/s^2.

  • Circular Motion: Centripetal Acceleration and Minimum Force

    Instead of linear velocity v we use angular velocity  and instead of linear acceleration a we use angular acceleration .

  • Angular Velocity And Acceleration

    Calculate (a) its angular acceleration, assumed constant, and (b) the total number of revolutions the engine makes in this time. 2) Pilots can be tested for the stresses of flying high speed jets in a whirling "human centrifuge," Which takes 1.0 min

  • Rotational Dynamics and Net Torque

    It uses revolutions to calculate radius, and then calculates angular acceleration and torque.

  • angular velocity and angular acceleratoin

    172663 angular velocity and angular acceleration Could you please provide the answers and workings out to the following physics problems. 1. A wheel with a 0.10-m radius is rotating at 35 rev/s.

  • Angular acceleration, tangential speed, and angle turned

    14841 Angular Acceleration, Tangential Speed, and Angle Turned A flywheel whose diameter D= 1.2 m, is initially rotating at Wo= 200 revolutions per minute.

View More Related Solutions