Tuesday
July 22, 2014

Homework Help: science

Posted by bruce on Saturday, April 27, 2013 at 11:56pm.

At time t =0, the current to the dc motor is reversed, resulting in an angular displacement of the motor shaft given by = (198 rad/s)t (24 rad/s2)t2 (2 rad/s3)t3 (15 marks)
a. At what time is the angular velocity of the motor shaft zero?
b. Calculate the angular acceleration at the instant that the motor shaft has zero angular velocity.
c. Through how many revolutions does the motor shaft turn between the time when the current is reversed and the instant when the angular velocity is zero?
d. How fast was the motor shaft rotating at t=0, when the current was reversed?
e. Calculate the average angular velocity for the time period from t = 0 to the time calculated in part (a).

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - 2. At time t =0, the current to the dc motor is reversed, resulting in...
College Physics - At t=0 the current to a dc electric motor is reversed, ...
science - Question: If you have an electric motor on a bench and hook it to the ...
Physics - The angular velocity of a process control motor is (21−12t2) ...
Physics - The angular velocity of a process control motor is (21−12t2) ...
Angular acceleration - Appreciate if someone can advise on how to calculate the ...
algebra - The power (P) required to run a motor is equal to the voltage (E) ...
Physics - The shaft of a pump starts from rest and has an angular acceleration ...
physics - I have to build a mini solar car for a school project and i have three...
Physics - An electric motor has 72 turns of wire wrapped on a rectangular coil, ...

Search
Members