Determine how fast was the motor shaft rotating

Reference no: EM13672738

At t = 0 the current to a dc electric motor is reversed, resulting in an angular displacement of the motor shaft given byθ(t) = (210rad/s)t - (21.5rad/s²)t² - (1.30 rad/s³)t³.

(a) Find at what time is the angular velocity of the motor shaft zero?

(b) Find the angular acceleration at the instant that the motor shaft has zero angular velocity.

rad/s2

(c) Obtain how many revolutions do the motor shaft turn through between the time when the current is reversed and the instant when the angular velocity is zero?

rev

(d) Determine how fast was the motor shaft rotating at t = 0, when the current was reversed?

rad/s

(e) Determine the average angular velocity for the time period from t = 0 to the time calculated in part (a).

rad/s

Reference no: EM13672738

Questions Cloud

Evaluate how much torque is applied to the disk : Starting from rest, a 10.69 centimeter diameter compact disk takes 4.8 second to reach its operating angular velocity of 1866 rpm. Evaluate how much torque is applied to the disk

Write a review article - compliance update in plain english : Please write a review article "Compliance Update in Plain English" by Christine Nelson, Journal of Financial Planning - Summarize the topic of the paper discussing the current laws and regulations and the proposals made for the future of the indust..

Compute the speed of the given object : Two objects are connected by a light string passing over a light frictionless pulley. Compute the speed of the 3.00 kg object just as the 5.00-kg object hits the ground

Why is roa good measure of retailers financial performance : Compare and contrast the calculated financial figures for Tiffany & TJX. Analyze and discuss why the percentages and ratios differ for the two retailers - Analyze which retailer has the better overall financial performance.

Determine how fast was the motor shaft rotating : At t = 0 the current to a dc electric motor is reversed, resulting in an angular displacement of the motor shaft given byθ(t) = (210rad/s)t - (21.5rad/s2)t2 - (1.30 rad/s3)t3. Determine how fast was the motor shaft rotating

Obtain what angle that the rod makes with the horizontal : A uniform 1.6 kilogram rod that is 0.61 meter long is suspended at rest from the ceiling by two springs, one at each end. Obtain the angle that the rod makes with the horizontal

Determine what is the electron drift speed : The 1.00 x 1020 electrons flow through a cross section of a 5.00 millimeter diameter iron wire in 6.00 second. Determine what is the electron drift speed

Find the use of complex models of project risk : Evaluate the use of complex models of Project Risk and Procurement Management; systematically and creatively making sound judgements based on the systematic analysis and creative synthesis of ideas.

Determine how long does it take a wave to travel : A block of mass 3.1 kilogram rests on a frictionless inclined plane, held in place by a string of mass 0.023 kilogram. Determine how long does it take a wave to travel from one end of the string to the other

User Account

All Pages