Aplayground merry-go-round has a mass of 50 kg and a diameter of 4.0 m. there are 4 children who want to ride on it. they have masses of 15 kg, 18 kg, 22 kg, and 25 kg. they start out on the edge of the merrygo-round but later move toward the center until they are halfway between the edge and the center.

a. sketch the arrangement of the children on the merry-go-round when they are at the edge and halfway to the middle.
b. what is the total moment of inertia for both arrangements?
c. the children are standing at the edge when their parents get the ride turning at 0.21 radians/sec. what is their tangential velocity and the period of rotation?
d. while the ride rotates the children move to their positions halfway to the center. what is the angular velocity when they get to their new spots? explain.

You and a friend (alex) are at a a tree-top adventure park .. . part of the course requires you to climb up a rope. you both climb the same rope in the same amount of time. however, the tension in the rope is greater when alex climbs. who did the most work? alex did - more tension means more force - more force means more work was done you did - less tension means less force - less force means more work was done to find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? when more work was done, the couch was moved less. when more work was done, the couch was moved further. when more work was done, the couch wasn't moved at all. when more work was done, the couch was moved the same distance.

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

True or false graphs must include scales that increase by the same amount