1. The problem statement, all variables and given/known data Given that the mass of a car is 1000kg, gravitational field strength = 10N/kg Find the force required to just lift the book up at a constant speed. 3. The attempt at a solution Constant speed, Accel. = 0 W = mg = 1000kg * 10N/kg = 10,000N Therefore force needed to just lift the book is 10,000N? However, by the newton's law, in balanced forces, object at rest will remain at rest... So the car was originally at rest, will it be lifted up by 10,000N?