Final answer:
No, the man cannot lift the package upward with 80 lbs of force since it's less than the package's weight of 200 lbs. Mechanical advantage, such as using a pulley system, is necessary to lift a heavy object with less force.
Step-by-step explanation:
The question asks if a man exerting 80 lbs of force can lift a 200 lbs package upward. The simple answer is, without any mechanical advantage such as a pulley or lever system, the man will not be able to lift the package if he can only exert 80 lbs of force because the force he is applying is less than the weight of the package. For the package to move upward, the force applied must equal or exceed the weight of the package.
Looking at the practice problems related to mechanical advantage and work done, such as lifting objects using a pulley system or moving heavy loads up a ramp, we can illustrate how mechanical advantage assists in lifting heavy objects with lesser force. For example, a pulley system that lifts a 200N (Newtons) load with an effort force of 52N would require multiple ropes for a high mechanical advantage. Moreover, the amount of work a person can do, such as lifting a barbell, is calculated as the product of force and distance.