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?

## 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 with r = 4m and a perfect frictionless bearing is ...
- Physics Inertia : Merry-go-round - A playground merry-go-round of radius 1.96 m ...
- physics - A merry-go-round in a playground has a mass of 200 kg and radius of 1....
- Physics - A 21-kg child starts at the center of a playground merry-go-round that...
- physics - A playground merry-go-round of radius 2.00 m has a moment of inertia I...
- Physics - A child (48 kg) stands on the edge of a stationary merry-go-round (...
- physics - A child of mass 54.7 kg sits on the edge of a merry-go-round with ...
- physics - A child of mass 52 kg jumps onto the edge of a merry-go-round of mass ...

More Related Questions