A hòrizontal force F of magnitude 20.0N is applied to a 3.00kg psychology book as the book slides a distance d=0.500 m up a frictionless ramp at angle 30.0⁰ (a) during the displacement, what is the network done on the book by F the gravitational force on the book, and the normal force on the book (b) if the book gas zero kinetic energy at the start of the displacement what is it speed at the end of the displacement

What law energy has never been broken

How much work does the charge escalator do to move 2.30 μc of charge from the negative terminal to the positive terminal of a 3.00 v battery?

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?