Angular Acceleration
posted by Shereen .
A child pushes a merry goround from rest to a final angular speed of 0.4 rev/s with constant angular acceleration. In doing so, the child pushes the merrygoround 1.1 revolutions. What is the angular acceleration of the merry goround?
I got .0727 but that doesn't seem to be the right answer

t = 1.1rev / 0.4rev/s = 2.75s.
a = Vf  Vo) / t,
a = (0.4  0) / 2.75 = 0.145 rev/s^2.
Respond to this Question
Similar Questions

physics
A 175 kg merrygoround in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. What constant force would have to be exerted on the rope … 
Physics
In a playground, there is a small merrygoround of radius 1.20 m and mass 190 kg. Its radius of gyration (see Problem 85 of Chapter 10) is 91.0 cm. A child of mass 44.0 kg runs at a speed of 4.50 m/s along a path that is tangent to … 
Physics
In a playground, there is a small merrygoround of radius 1.20 m and mass 190 kg. Its radius of gyration (see Problem 85 of Chapter 10) is 91.0 cm. A child of mass 44.0 kg runs at a speed of 4.50 m/s along a path that is tangent to … 
Physics
A merrygoround is at rest before a child pushes it so that it rotates with a constant angular acceleration for 38.0 s. When the child stops pushing, the merrygoround is rotating at 1.20 rad/s. How many revolutions did the child … 
physics
6.A child pushes a merry goround from rest to a final angular speed of 0.46 rev/s with constant angular acceleration. In doing so, the child pushes the merrygoround 1.3 revolutions. What is the angular acceleration of the merry … 
physics
A merrygoround starts from rest and accelerates uniformly over 29.0 s to a final angular velocity of 5.35 rev/min. (a) Find the maximum linear speed of a person sitting on the merrygoround 4.50 m from the center. (b) Find the person's … 
phys5
A child pushes a merry goround from rest to a final angular speed of 0.44 rev/s with constant angular acceleration. In doing so, the child pushes the merrygoround 1.8 revolutions. What is the angular acceleration of the merry goround? 
Physics
A child pushes a merry goround from rest to a final angular speed of 0.78 rev/s with constant angular acceleration. In doing so, the child pushes the merrygoround 1.6 revolutions. What is the angular acceleration of the merry goround? 
physics
A merrygoround starts from rest and accelerates uniformly over 26.0 s to a final angular velocity of 5.50 rev/min. (a) Find the maximum linear speed of a person sitting on the merrygoround 4.25 m from the center. (b) Find the person's … 
Physics
A child pushes a merry goround from rest to a final angular speed of 0.6 rev/s with constant angular acceleration. In doing so, the child pushes the merrygoround 1.8 revolutions. What is the angular acceleration of the merry goround?