An electrician holds a 3.2kg chandelier against a ceiling with a force of 53N [up]. What is the normal force exerted by the ceiling on the chandelier?
The normal force exerted by the ceiling on the chandelier is equal in magnitude but opposite in direction to the force exerted by the chandelier on the ceiling.
Given that the electrician holds the chandelier against the ceiling with a force of 53N upward, the normal force exerted by the ceiling on the chandelier would be 53N downward.