Yes, more friction generally means less work is done. Work is defined as the product of the force applied to an object and the displacement of the object in the direction of the force. When friction is present, it acts opposite to the direction of motion or the applied force, thereby opposing the motion of the object.
Frictional forces can be categorized into two types: kinetic friction and static friction. Kinetic friction occurs when an object is already in motion, while static friction acts on an object at rest, preventing it from moving. In both cases, friction reduces the overall displacement of the object.
Since work is directly proportional to displacement, when friction is present, the displacement of the object is reduced, leading to less work being done. The energy that could have been used to do work is instead converted into other forms, such as heat or sound, due to the frictional forces.
It's worth noting that there are situations where friction can be utilized to perform useful work, such as the braking system in a car or the friction between our feet and the ground when we walk. However, in general, when considering the effect of friction on work, an increase in friction typically corresponds to a decrease in the amount of work done.