Question

what is the force that the shovel is adding to the dirt in this image (red arrow)? output force input force (also called effort force)

Explanation:

The shovel is a tool. When using a shovel, the force applied by the shovel on the dirt is the output force. The output force is the force exerted by the machine (in this case, the shovel) on the object (the dirt). The input force (effort force) is the force applied by the person on the shovel.

Answer:

output force