An astronaut drops a feather from 3.6 m above the surface of the moon.
If the acceleration of gravity on the moon
is 1.62 m/s^2, how long does it take the feather
to reach the surface?

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

Why do astronauts in the space shuttle weigh less?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of