A smuggler wants to check in 40kg of luggage but the regulat

A smuggler wants to check in 40kg of luggage, but the regulation says that the maximum mass is 30kg. What should a smuggler do after he puts the luggage on the scale to make the scale show a 30-kg reading? Your answer should mdicatc the direction and the magnitude of the force that he should exert on the luggage while it is on the scale. To answer the question, draw a free body diagram with the luggage as the system and then apply Newton\'s third law to relate your diagram to the reading of the scale.

Solution

F=40*9.8
F=392
this means that the luggage exerts 392N of force on the scale we need it to exert
30*9.8=294
294N of force on the scale.
The smuggler can do this in one of two ways.
He can exert (392-294) 98N of force from under the scale (by placing an object under it). Or he can place helium or another gas lighter than air inside the luggage to exert the necessary 98N of force upward to prevent the scale from reading 40kg.