Imagine a book that is falling from a shelf. At a particular moment during its fall, the book has a kinetic energy of 25 J.
What was the initial potential energy of the book, and what is its total kinetic energy at the instant just before it strikes the floor?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

70 give a real life example showing how sensory neurons work with the motor neurons

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)