Author Question: A 40.0-kg child running at a speed 3.00 m/s jumps on a stationary playground merry-go-round at a ... (Read 127 times)

frankwu · **on:** Jul 29, 2018

A 40.0-kg child running at a speed 3.00 m/s jumps on a stationary playground merry-go-round at a distance 1.50 m from the axis of rotation of the merry-go-round.

The child is traveling tangential to the edge of the merry-go-round which has a 600 kgm2 moment of inertia about its axis of rotation as she is running. What is the angular speed of the merry-go-round after the child jumps on it?
A)

0.788 rad/s

B)

0.261 rad/s

C)

6.28 rev/s

D)

2.00 rad/s

E)

3.14 rev/s

Question 2

A geosynchronous satellite is one that stays above the same point on the Earth, which is possible only if it is above one of the Earth's poles.

Indicate whether the statement is true or false