A10-kg box is pushed up a plane inclined at 37º with the horizontal. the box starts from rest and is pushed 5 m along the incline with a uniform acceleration of 2 m/s2. the coefficient of kinetic friction is 0.20 and the pushing force is parallel to the plane. the increase in the potential energy of the box is

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.