A book is at rest on a table. Identify the correct free-body diagram for this situation.

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

If element x has 99 protons how many electrons does it have