Homework Help: Physics

Posted by Bell on Wednesday, January 20, 2010 at 8:13pm.

A merry-go-round in the park has a radius of 1.8 m and a rotational inertia of 900 kgm^2. A child pushes the merry-go-round with a constant force of 80 N applied at the edge and parallel to the edge. A frictional torque of 12 Nm acts at the axle of the merry-go-round.
a. What is the net torque acting on the mery-go-round about its axle?

b. What is the rotational acceleration of the merry-go-round?

c. At this rate, what will the rotational velocity of the merry-go-round be after 15s if it starts from rest?

d. What is the rotational acceleration of the merry-go-round if the child stops pushing after 15 s.? How long will it take for the merry-go-round to stop turning?

Physics - bobpursley, Wednesday, January 20, 2010 at 8:13pm
I will be happy to critique your thinking or work.
Physics - mbg, Tuesday, April 20, 2010 at 10:17am
mmm

Answer this Question

Related Questions

physics - A merry go round in the park has a radius of 1.8 m and a rotational ...
physics - A merry-go-round in the park has a radius of 1.8 m and a rotational ...
physics - A merry-go-round in a playground has a mass of 200 kg and radius of 1....
Physics Inertia : Merry-go-round - A playground merry-go-round of radius 1.96 m ...
Physics: merry-go-round question - A playground merry-go-round of radius 1.92 m ...
physics - A 39.0kg child runs with a speed of 2.70m/s tangential to the rim of a...
Physics - A disk with a rotational inertia of 7 kgm^2 rotates like a merry-go-...
rotational motion physics - A 3.7 m diameter merry-go-round is rotating freely ...
Physics - A horizontal 873 N merry-go-round of radius 1.11 m is started from ...
Physics - A merry-go-round with r = 4m and a perfect frictionless bearing is ...

For Further Reading

First Name:
School Subject:
Answer: