1. The problem statement, all variables and given/known data Which requires less force? -pushing an object 1.2m over a rough surface -lifting an object to a height of 1.2m -pushing an object 1.2m over a smooth surface -lifting an object to a height of 1.2m using an inclined plane 2. Relevant equations F=ma 3. The attempt at a solution Pushing an object over a rough surface is going to require more force since friction is opposing the applied force. Lifting the object directly upwards is going to involve gravity soo.. im down to pushing over a smooth surface or lifting using an inclined plane. My guess for the answer to this question is currently pushing over a smooth surface since there is not much friction involved.