Maany
12-25-2007, 01:30 PM
ارجو مساعدتي في حل واجب الفيزياء:(
Problem 1- The figure below shows a graph of angular velocity versus time for an a
rotating object.
a) What is the average angular
acceleration between t=0 and t= 12 s?
b) Find the instantaneous angular
acceleration at t= 4 s.
c) What is her angular displacement in
the 8 second period shown in the
graph?
d) How many revolutions the object does in the first 8 seconds?
Problem 2- A wheel rotating about a fixed axis has an angular position given by
q = 3 − 2t 3 , where q is measured in radians and t in seconds.
a) What is the average angular acceleration of the wheel between t= 0 and at t =
2 s?
b) What is the angular acceleration of the wheel at t = 2 s?
Problem 3- A wheel rotates about a fixed axis. It starts with an initial angular
velocity of 20 rad/s. After 5 seconds the angular velocity increases to 40 rad/s.
Assume that the angular acceleration was constant during the 5 s interval.
a) How many revolutions does the wheel turn through during the 5 s interval?
b) What is the magnitude of the linear (tangential) acceleration of a point on the
outer edge of the wheel? The radius of the wheel is 50 cm.
Problem 4- The rigid object shown is rotated about an axis perpendicular to the
paper and through point P. The total kinetic energy of the object as it rotates is equal
to 1.4 J. If M = 1.3 kg and L = 0.50 m, what is the angular velocity of the object?
Neglect the mass of the connecting rods and treat the masses as particles.
لي سؤال 1 و4 يوجد رسمات الي حاب يحل يرسل رسالة خاصه
Problem 1- The figure below shows a graph of angular velocity versus time for an a
rotating object.
a) What is the average angular
acceleration between t=0 and t= 12 s?
b) Find the instantaneous angular
acceleration at t= 4 s.
c) What is her angular displacement in
the 8 second period shown in the
graph?
d) How many revolutions the object does in the first 8 seconds?
Problem 2- A wheel rotating about a fixed axis has an angular position given by
q = 3 − 2t 3 , where q is measured in radians and t in seconds.
a) What is the average angular acceleration of the wheel between t= 0 and at t =
2 s?
b) What is the angular acceleration of the wheel at t = 2 s?
Problem 3- A wheel rotates about a fixed axis. It starts with an initial angular
velocity of 20 rad/s. After 5 seconds the angular velocity increases to 40 rad/s.
Assume that the angular acceleration was constant during the 5 s interval.
a) How many revolutions does the wheel turn through during the 5 s interval?
b) What is the magnitude of the linear (tangential) acceleration of a point on the
outer edge of the wheel? The radius of the wheel is 50 cm.
Problem 4- The rigid object shown is rotated about an axis perpendicular to the
paper and through point P. The total kinetic energy of the object as it rotates is equal
to 1.4 J. If M = 1.3 kg and L = 0.50 m, what is the angular velocity of the object?
Neglect the mass of the connecting rods and treat the masses as particles.
لي سؤال 1 و4 يوجد رسمات الي حاب يحل يرسل رسالة خاصه