A 20 g. book is sitting on a shelf that is 3.0 meters off the ground. Kinetic energy is found using the formula 1/2 x mass x speed. Potential energy is found by taking mass x g x height, with g as the
constant, 9.8 m/s? What is needed to determine the book's mechanical energy as it sits on the shelf?

Marcella is a four-year-old girl who is a victim of emotional child abuse. based on the child and family services improvement and innovation act of 2011, which action should the government take for marcella? a. the state should arrest marcella’s abuser. b. the state should find a home for marcella as soon as possible. c. the state should enforce stricter laws in the area where marcella resides. d. the state should provide medical assistance to marcella.

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?

Where should a carbon monoxide detector be mounted?