A merry-go-round has |= 319 kg•m², and is initially rotating at
2.33 rad/s. A 25.8 kg kid hops on,
1.40 m from the axis. What is the
new angular velocity?

[?] rad/s

Which statement best describes resistance? resistance is a. how well a current will flow in a material and is measured in volts. b. how well a material conducts an electrical charge and is measured in ohms. c. the ability of a material to attract a positive charge to create a current. d. the ability of a material to repel neutral charges and is measured in ohms.

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

True or false: the revolution of the earth creates day and night as it rotates around the sun