الحــتــف
31-10-2010, 22:13
السلام عليكم ورحمة الله وبركاته ..
اخواني ممكن احد يساعدني فيها ابيها اليوم اذا ممكن
a cyclist negptiates the curvature of 20m with a speed of 20m/s. what is the magnitude of his acceleration?
an astronaut,exeuting uniform circular motion in a centrifuge of radius 10m,is subjected to a radial acceleration of 4g.The time period of the centrifuge (in seconds)is:
π ; 2π ; 3π ; 4π
A particle moves along a circle of radius ،،r‘‘ meter with a time period of ،،T‘‘ . The acceleration of the particle is :
4π2r/T2 ؛ 4π2r2/T2 ؛ 4πr/T
طبعا العدد 2 = الاس في كل الاجابات
which of the follwing quantities are constant in uniform motion:
a) Velocity and acceleration
b) Magnitude of acceleration and radius of the circular path
c) Radius of the circular path and speed
d) Speed and acceleration
which of these is/are correct for a particle uniform circular motion:
a) The acceleration of the particle to the path
b) The acceleration of the particle in the direction of veloctiy is zero
c) The time period of the motion is inversely to the radius
d) for a given acceleration,velocity of the particle is proportional to the radius of circle
اخواني ممكن احد يساعدني فيها ابيها اليوم اذا ممكن
a cyclist negptiates the curvature of 20m with a speed of 20m/s. what is the magnitude of his acceleration?
an astronaut,exeuting uniform circular motion in a centrifuge of radius 10m,is subjected to a radial acceleration of 4g.The time period of the centrifuge (in seconds)is:
π ; 2π ; 3π ; 4π
A particle moves along a circle of radius ،،r‘‘ meter with a time period of ،،T‘‘ . The acceleration of the particle is :
4π2r/T2 ؛ 4π2r2/T2 ؛ 4πr/T
طبعا العدد 2 = الاس في كل الاجابات
which of the follwing quantities are constant in uniform motion:
a) Velocity and acceleration
b) Magnitude of acceleration and radius of the circular path
c) Radius of the circular path and speed
d) Speed and acceleration
which of these is/are correct for a particle uniform circular motion:
a) The acceleration of the particle to the path
b) The acceleration of the particle in the direction of veloctiy is zero
c) The time period of the motion is inversely to the radius
d) for a given acceleration,velocity of the particle is proportional to the radius of circle