The force required to push the block along the ceiling can be calculated using the equation F = ma, where F is the force, m is the mass of the block (4.00 kg in this case), and a is the acceleration. The specific force needed will depend on the surface of the ceiling and the friction between the block and the ceiling.
The weight and normal force act in opposite directions on the block, with the weight pulling it down towards the ground and the normal force pushing it up against the ceiling. As the block is pushed along the ceiling, the normal force will adjust to counteract the weight and keep the block in motion.
Yes, with a constant force and no external forces acting on the block, it can be pushed along the ceiling with a constant velocity. This is known as uniform motion.
The force needed to push the block along the ceiling will depend on the mass of the block, the coefficient of friction between the block and the ceiling, and the acceleration or velocity desired. Other factors that may affect the force include the surface texture of the ceiling and any external forces acting on the block.
The angle of the ceiling will affect the force needed to push the block along it. The steeper the angle, the more force will be required to overcome the weight of the block and the friction between the block and the ceiling. This is due to changes in the normal force and the component of the weight acting parallel to the ceiling.