People who have difficulty remembering recently learned materials because of similar information learned earlier in life are demonstrating the phenomenon of

Proactive interference

Explanation:

Proactive interference is a memory disorder this occurs when the old memories of a person restrain the capacity of the brain to retain the new memories. Thus no new information can be retain in the brain. This may happen when the memories are similar. For example, finding difficulty in remembering the new and old phone numbers.

The given situation is an example of proactive interference as the people may find difficult to learn and remember the recently learned materials as the similar information was also learned in the past.

to increase speed you need to decrease frictiona dn drag hense why sprinters wear tight track suits to keep tight against there skin to keep away from wind and decrease the amount of drag you are carrying.a swimmer will wear the tightest swim suit they can possibly fit into (i was a size 28 swim suit at meets i wore a   size 23) why? because the tighter your clothing is the less drag and negative force you have. the heavier the clothe the slower and more wind gets caught. cotton tends to hold onto alot of sweat and water making it slower then say a track suit (no idea what they are made of but they are really comfy around your answer )

answer normal force;